Be prepared, a crash of the dollar would more than likely bring down other world currencies. The world economy would be in ruins. Commodities would be a nice safe haven if the dollar ever crashes.
so just use another currency to replace it, thats simple. I agree that commodities is nice save haven. Bitcoin is mined like gold, si I think if dollar and other fiat is crashes. Bitcoin price will stable as gold. Thats my opinion.
if and when US dollar crashes, people will start investing their money in other things, mostly gold, and other famous investments and a small group of them will invest in bitcoin and that means price of bitcoin and in smaller scale price of other things will start rising and become volatile because of the chaos it creates. it certainly wouldn't be pretty and stable.
I do not understand where you got this information? I understand that the dollar has some problems, but they are not so significant to cause a collapse. That will not happen in the next few years