Earlier quoted context omitted.
What prevents you from setting up a BitCoin bank? More interestingly: are the features that let you set up a dollar-denominated bank features or bugs?
Banks are regulated by law and have the funds insured by FDIC. i.e even if the bank goes belly up, the FDIC will make sure the depositors get the money. With BitCoin, how do you trust a bank? Even if it's just by word-of-mouth trust, eventually the bank will be taken over or run by non-trustworthy people. The threat of federal prison keeps most real banks honest. Nothing like that exists in the BTC world.
- Will the FDIC fulfill its obligations at all times?
- How does the FDIC have the resources to do so?
- Does the presence of the FDIC lead to better or worse behavior among banks?
It's especially interesting to look at the issue of non-trustworthy people. When S&Ls were semi-deregulated in the early 80's, they got extra FDIC protection and were allowed to lend to a wider variety of projects. Suddenly, the credit decisions of the bank didn't matter, because the FDIC backstopped their deposits. And that attracted some really non-trustworthy people.
Wikipedia says the total cleanup cost was $87.9 billion, which discounts the opportunity cost from building pointless malls and empty offices. Can you imagine a BitCoin-based system ever hitting that level of losses?