I have to admit to being a contrarian regarding crypto. BTC is clearly insecure and has been subject to price manipulation. Other cryptos are generally losing value. The main problem, even for the high-security cryptos, is the lack of demand. When cryptos become useful for trading, prices will rise.

By definition, money is both a medium of exchange and a store of value. Most cryptos are more volatile than foreign exchange, so they fail for both of these.

None of these arguments rule out specialized uses of cryptos. I don't know what they are, but I'm only one person.