Zhukov said:
I don't understand bitcoins.
I looked it up after that thing with the guy losing millions in bitcoin on a junked hard drive and it made no sense to me at all.
Can some explain, in layman's terms, what the hell a bitcoin is?
Bitcoins are a currency backed not by a government, but by complex algorithms designed to enforce security. These algorithms are example of public key cryptography. They pair a public key and a private key together, and you can encrypt data using either key; but to decrypt data you need the other key.
Each person's Bitcoin wallet is represented by the pair and the public key is, well, public. People who want to send money to the wallet encrypt the transmission using the wallet's public key and the owner of the wallet (who should be the only one to know the private key) decrypts it. The sender also needs to use their own wallet's private key to encrypt the message so that it's confirmed that they're the sender. There's a number of other parts to the whole deal (a bunch of servers must each independently mathematically validate the transaction and agree for it to occur, new bitcoins are made by doing effectively useless but very computationally expensive work) but that's the basics of how Bitcoins work.
The millions of dollars lost on the hard drive was because he had his private key on there; without that, there's no way to access his wallet.
Heronblade said:
It also hold advantages in purchases of an illegal nature, such as drug trades, money laundering, and gun purchases without background checks. Some groups claim that the majority of bitcoin transactions are less than legal, but that is an obvious exaggeration.
The main disadvantage is that there is even less backing up its value than normal cash gets, the worth of a particular bitcoin is determined solely by public perception. People can lose huge amounts of money whenever that perceived value goes down.
One major issue with using Bitcoins for illegal purposes is that the transaction history is public. No names or anything are directly attached to the purchases, but it does still leave a trail that can be followed. It's not quite the criminal haven that it is sometimes purported to be.
Every currency is backed up by public perception. Traditional ones have a government behind them, but that is just another assurance which affects public perception. Not an insubstantial number of people actually view that as a liability to the currency's stability instead of a benefit (given the amount of control the government has over their currency), and many of those people are interested in Bitcoins for that reason. A currency that is backed by mathematical proofs instead of a politician's respect for and understanding of economics may be a hell of a lot more stable in the long run than any other modern currency.
It's still a relatively small market and, as such, is relatively vulnerable to big shifts in value; that would be true of any currency this small. As with any investment, you're being paid for the risk you take.
Heronblade said:
Frankly, its the kind of thing that a shrewd investor could make quite a bit of money on at the expense of everyone else foolish enough to use it as a principle currency. Over the past few years, the value of a bitcoin compared to a dollar fluctuated wildly, ranging from about thirty cents in 2011 to over $900 last month. I'm actually wishing that I had bought fifty dollars or so worth of bitcoins back towards the beginning of this event, I could have made six figures by selling them at this point. Cash that I sorely need right about now.
I'm pretty sure everyone is wishing for something similar. Unfortunately, that's how pretty much any uncertain investment works. I could complain about Apple's stock in the same tone for the same reasons. Hindsight has its very strong biases, though, and it doesn't change the information you had at the original decision. It may have still been a bad choice early on.
It pretty much boils down to if enough people think that it will be a good investment, it becomes a good investment. If enough people don't think it'll be a good investment, it won't.