I have used cryptos for shopping and for mobile recharges often. Also, I do Forex trading and cryptos are the best way to buy USD from my local currency as it is not legal to buy USD directly from my country's currency. Moreover, some of my family members live in another country and Bitcoin is the best way to send money there.
It's a convenient way to do transactions now, no need to go to banks. It is useful as long as we know how to use it. Mostly it's for sending payments and load and shopping, soon there will be more useful for crypto so as much as possible make it as an investment.