Consider all the various asset classes. Stocks and bonds and the largest classes of investments. In a place where the government goes into a financial crisis, which class outperforms? The Federal Reserve is engaged in financial repression, you will have a negative real return on bonds. Stocks will suffer because the economy will be crushed, growth will die. Cash, it needs little explanation. If you wish to hold cash while the Fed prints a trillion in fiat every couple months, good on you.
Levered real estate is not a bad option. Debt values are fixed, rents depend mostly on nominal dollar salaries. Real estate will perform well, but you have to be levered before interest rates rise. It's a dicey proposition, but not bad at all.
Gold has storage costs but it is a decent inflation hedge. But you are likely paying a 20% premium up front and you can't do much with it. Overall, I don't like it, but I understand it for purposes of diversification, it has a negative correlation with financial assets.
Bitcoin, however, is fixed in supply. You can buy stuff with it. There is no significant cost to buying or selling, and no storage cost. Maybe later we can get some interest. There is limited ability to pay for retail purchases, but that will change very shortly (at the very least, there will be a "Bitcoin" credit card where you pay the bill in Bitcoin). And it is new, people are buying it for the first time every day.
It is the best asset class to buy and hold for the reasons I gave above. And the best thing is, a lot of people haven't figured that out yet.