Here's one good use: I looked into leaving the US to become a citizen elsewhere. I have about $15MM in my retirement. I would have to pay a penalty on my taxes for early withdrawal, and be taxed when I renounce my citizenship. In theory I could cash everything out, buy a huge amount of BTC, move to another country (within a week, or quickly!!), and then cash it out in their currency. Of course, all sorts of alarm bells would go off if a normal schmoe like me tried to move that much money out of my investment account, because I'm not rich enough to break finance laws like people worth 10x, 100x or 1,000x more than me can do without going to jail. And I'd be terrified that the other country would OOPS my deposit like in the film Blow with Johnny Depp.