This is most primary reason for cryptos to be invented but most people afraid the cryptos could be hacked.The actual thing is fiat money is more unsecured compared to fiat digital wallet the only thing need to be aware is keep the private keys safe,you are in full control of your wallet.
You might be wrong here with this statement, fiat digital money is secure when it comes to user perspective, if i loose my money from any of the banks, i can very well claim that amount and they will have to refund it, if they are hacked or stolen without my knowledge and that is the most secure part and that cannot be said about crypto currency as there is no guarantee if your money is lost to hackers, as money once lost is lost forever.