Personally I have put more than 20% = ~40kUSD into the crypto space. I was only a signature away from a bank loan of 80kUSD in december which I am not extremely happy did not go through (would've bought BTC around 18k). In december my portfolio went from 20k to 81kUSD(was lucky to purchase DeepOnion around 2USD/DO and they hit 18USD/DO 7 days later, and today I am again hovering around 25-28kUSD.
I dont have much money saved up outside of a retirement plan, but a big chunk of what I do have is in cryptocurrencies. Im not sure if the percentage but its probably over 50%. That seems high but keep in mind that I do have a retirement plan at work that should take care of the majority of my retirement. This is just the extra money that I put in cryptos.