You are comparing unrelated issues. Of course, if you hand the keys to someone you might get robbed. Regardless. But if my credit card details get stolen or someone hacks into my bank account while I maintained safe handling standards then I get reimbursed. Not so with a crypto exchange or market place. My hsbc or JPMorgan does not disappear overnight like crypto exchanges in the past and present. If a Rogue employee at my bank steals something then I as customer get reimbursed by my bank. At a crypto shop a single employee can bring down the entire shabang.
Inflation,people speak of inflation. There is NO inflation other than in speculative assets and you can hedge by being long speculative assets, lol. Once basic consumption baskets exhibit inflation again you can place your cash into tbills. This all applies to scenarios where there are not negative interest rates charged on savings or chequing account balances.