You crypto portfolio shouldn't be over 20%. At least I won't. 70%-90% is just too much in such volatile market, and I am not sure if we can consider cryptos as a "safe haven"  I will prefer to invest at least 50% in precious metals which are far more safe than cryptos. 70% in cryptos you are taking the risk to the extreme as possible. But, of course, you know, usually bigger risk means bigger profits, but when it's about securing your investments it is something else.