But what I defect to do in this video is talk about what a bitcoin is in more general terms and what differentiating characteristics they have compared to other approaches. So for starters, bitcoin is just an electronic payment system. By electronic payment system, I mean it's just a vehicle, a conduit, by which two partisan can transact over the internet. I call these parties Alice and Bob. And let's say Alice for whatever reason poverty to give money to Bob over the internet. And this may be because she owes Bob money, or possible Bob is a merchantman and Alice is buying something from Bob. Or maybe Bob is a not-for-improve, and Alice is making a donation to Bob. So there could be many reasons why Alice is trying to pay Bob over the internet in some capacity. Now, if Bob is willing to accept bitcoins, which are a formality of electronic payments, then Alice can go ahead and send Bob some value in bitcoins. And really, a bitcoin transaction between Alice and Bob amounts to a specially constructed sequel of numbers that Alice will basically bestow over to Bob. And this will be done entirely over the internet. These numbers will have certain mathematical properties. They make it hard for someone to really defraud the system or to conduct some type of nefarious action on the system. And the way that Alice is actually going to conduct this process in practice is either by installing a special piece of software, which we call a bitcoin dependent, or she can work with a third-party service that can handle these mechanics for her. But in either plight, either the client or the service is going to conceive these numbers for Alice. And on the turn side, Bob will also typically either have a piece of software installed or he'll necessity a third-party service that will take these numbers and allow him to do something else with those numbers. For example, Bob can in turn buy something on his own with those numbers, or he can trade those numbers in for realist money and so on and so forth. Now, one of the first subject you might have-- and I kind of alluded to this earlier-- is why would Bob even want to accept bitcoins in the first place? After all, a bitcoin is just a bunch of numbers. What intrinsic value would it conceivably have? And it turns out, quite surprisingly, that bitcoins actually have real-world value. There are more and more merchants popping up each day who accept bitcoins for transactions. There are also bitcoin change, places where you can go and exchange bitcoins for more mainstream currencies. And some of exchanges hold-- the major one is one called Mt. Gox. And at Mt. Gox you could swap a bitcoin for a euro or yen or dollar and so on and so forth. Now the current price of a bitcoin, the current value of a bitcoin in US dollars as of this video, is approximately US$100. per bitcoin. That number is fluctuating. This is a new currency, and there's going to be some unsteadiness. But as people understand the currency better, the hope is that that fluctuation will decrease. But I expect ultimately, the thing to keep in mind is that the value of a bitcoin is going to be derived from the trust that you have in the luminosity of what you can procure with that bitcoin. It's just like you would for a dollar, a euro or desire. The faith that you have in that currency's appraise is how you value that fluency. Now another question you might have is why do people even bother with bitcoins in the first place. Aren't there other more standard ways? Why couldn't Alice and Bob use Paypal? Why couldn't they use a credit card number to transact? Why couldn't Alice just sent Bob an electronic check? Why not usage one of these other approaches that are more well understood, that are more mainstream, that are more established? Why on earth would you possibly want to mess with a good furniture? So it turns out that there are a few properties of bitcoins that are estimable noting. For starters, there's privacy. It turns out that within the bitcoin ecosystem, within the bitcoin network, people can transact without divulging who they are in the real Earth. From the perspective of bitcoin, Alice's identity is impartial going to be a sequence of numbers. And that sequence of numbers is effectively going to function like a pseudonym for Alice. And that sequence of numbers has nothing to do with your real-world identity. Nobody needs to know this is Alice transacting. All they need to trouble about is their pseudonym within the system. And this is kind of but not quite like what you would get if you bought something using cash. In that capacity, when you take something using cash, then you don't have to provide any inside information or proof regarding who you are in the actual world. And that's separate from, let's say, using a credit card, where you have to provide your name and your billing address and so on. Or let's say foresee an electronic repulse, where you need to tie that electronic check, typically your bank account details. Now, I do want to also mention here that sometimes when you have a cash list or a transaction that uses currency, there is now the possibility that people might try to use these transactions for malicious purposes to ransom illicit traps and services. That definitely is a risk that occurs when you provide anonymity and secret. But there are certainly legitimate argument why someone might want to conduct a transaction privately and not have the whole world know what they're transacting. Another title of bitcoin is that it's open. Literally anyone can get involved. Literally anyone who was an internet connection can make a bitcoin affair. And all you need to do to get started is, as I alluded to earlier, is download this special bitcoin buyer. And the bitcoin client, or for that body you can use a service like Mt. Gox which will effectively do the same product as a client for you. But the short of it is that anyone who has a bitcoin buyer or who has an narrative with an exchange like Mt. Gox can bespeak in bitcoin transactions. That transaction, the details of it, the mechanics of it will be transparent to the user. All the user has to worry about-- all Alice needs to plague about-- is how much money she has and whether she can give that money to Bob. The actual software underneath will take care of all the underlying mechanics of facture that proceeding work. Now, this is different. When you think about a traditional currency like a dollar, if I want to transact something online, typically I need a bank account, I need a credit card, and so on and so forth. Then we often take it for granted that there are people out there who may not have access to a credit card, who may not have a bank account. For example, in the United States alone it alter out-- and I just looked this up-- the number of households without a bank account, I read it, is somewhere l of about 8%. It's pretty high. There are a lot of community out there who wouldn't be able to conduct a traditional internet transaction, but who can conduct a transaction using bitcoin. And by the way, there are people using bitcoin all over the world. And literally it doesn't matter where you are in the world, as long as you have an internet connection, you can start transacting bitcoins. Now, another property of bitcoin that's worth numerate is that it's decentralized. There's no bank or centralized entity that can really control what's happening in the bitcoin ecosystem. It's all done in this kind of ad hoc fashion. And what that means is that when you do a transact-- or when Alice d with Bob over the internet, that transaction doesn't have to go through a third party. There's no bank that gets in the way of that transaction. And that can have certain endowments as well. For example, that means that no one entity can directly control the money yield of bitcoins. That also import that no one entity can see your assets. Or for that matter, no one entity can reverse a transaction, which is definitely desirable for certain merchants. Some trafficker might not be able to deportment business online because of fraud concerns. And if you have a system where the transactions cannot be charged back easily, then from the trade's delineation, they may be able to prevent fraud and thereby that might enable their business entirely online. Now I want to point out that this last property of decentralization definitely causes solicitude among some people or not in bitcoin after all. When you think about it, a central testimony inclination a embank does complete an important function in the firm of a traditional currency. For precedent, banks might validate currencies. They might validate transactions against fraud. Now, in bitcoin, this validation is basically done in a decentralized way by the other parties, the other nodes, in the bitcoin plexure. Now, the goal of the relics videos in this series is to walk through the underlying mechanics of bitcoin transactions and really how they're validated, even though the system is decentralized. And there are some pretty amazing techniques that are used to make all this duty. So I suspect that at this point, you may have a ton of questions about bitcoin, and that's fully to be think. Bitcoin is a very complex protocol. It has many moving parts. And I think it's critical when you're trying to understand something as complex and wrap your head around something as sophisticated as bitcoin, it's important to get exposed to all the parts first so that you can ultimately get a flavor for how they fit together. And hopefully the other videos in this series will help you to understand these dissimilar parts and along the way address many of the questions that you might have.
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