Then there's the fraud. If the underside of society or the get rich quick types thought for a femtosecond they COULD NOT convert crypto nonsense into actual useful currency (usd, Euro, etc.) --- which is what they really want anyway --- their interest in crypto would die the same day. Ditto for miners and exchanges.
Crypto is used primarily to evade regulation, bilk the stupid people, or wash ill gotten gains.
None of that is remotely close to value add to the economy.
Crypto has feasibility issues quarter to quarter of not being hacked with no serious regulation (based in law with enforceable judgements based on finding of fact) to counter fraud.
You got a one off transaction that your bank doesnt handle? Use PayPal, stripe, amex.
Cryptography is highly resistant to fraud, maintaining high integrity by merit of things like hash functions and digital signatures. Humans fall for scams and we can’t blame the math for their ignorance.
Maybe you might get the point of this next decade, but I do sincerely hope that you have a simple life of PayPal mediated transactions.