don't invest in a way that may have you lose all your money. Absolutely do not do that.
That's always great advice, and especially nowadays when you have things like Libra getting extreme scrutiny from the government. Who knows what's going to happen, what laws are going to be passed regarding bitcoin?
OP, any single government could crack down on crypto, but it would take a bunch of them altogether to really have an effect. I don't think the United States is going to do anything as far as outlawing bitcoin, even if they're giving Facebook a hard time. Bitcoin isn't a stablecoin like Libra is supposed to be and isn't really a substitute for fiat. Still, you just never know what these asshole lawmakers are going to do.
Anyone remember Prohibition in the 1920s? Yeah, the US government was responsible for that failed experiment as well as the current war on drugs and everything else. They think they can legislate the world into being clean and squeaky, but they're silly for thinking that. My point is that I wouldn't put it past them to try to make crypto use illegal. But even if the US did it, it's only one country and it wouldn't necessarily stop people anyway.