I don't think it's fair to determine the size of the risk based on numbers... because everyone's money is different... even if Elon Musk buys bitcoin for $1 billion USD, it only risks 0.3% of his wealth... while if I use that amount of money to trade in cryptocurrency, it's clearly a very large amount...
if you want to receive my personal response in the form of a percentage, then I have used 80% of my total assets in the form of Bitcoin... yes, that sounds terrible, but for now after Bitcoin reached $80k - $100k, I have sold it gradually... and my current Bitcoin ownership is only about 5% of my total assets...