Bitcoin doesn't seem particularly useful for evading government controls in the US or the EU, but it does in much of the rest of the world, where the government

Bitcoin doesn't seem particularly useful for evading government controls in the US or the EU, but it does in much of the rest of the world, where the governments are typically incapable of something like the US anti-money-laundering regime. A sensible reason for a US investor to invest in bitcoin would be to sell it in the future for more than he paid for it to some saver in some non-US non-EU country, and most US investors would have no particularly strong motive to hide such an investment from the US government.