You cannot get margin called on a cash account, because you cannot make positions that are not 100% collateral covered, unless you have 25k. Then you can do that, and trade more than 3 times a week (and don't have to wait til settlement)

Pension funds don't deserve to go bust, but shouldn't be bailed out if they fail to diversify their portfolio.

There are a lot more safe-gaurds in investing, because all these games have been played before.

But those require consent too - with crypto, someone can, and will, irrevocably steal your funds without possible recourse.