Whereas investors could only lose totally on Cryptocurrency when they fail to invest on Bitcoin or other good Cryptocurrencies and instead invest on shit coins, or they save their assets on a custodial wallet instead of a non-custodial one, else Cryptocurrency especially Bitcoin is one of the best and safest investment any investor could think of.
I wonder why anyone would even think of buying shares with a local bank or saving huge part of their money with them, when they could save for a long-term with Bitcoin and make huge returns later, Bitcoin blockchain makes it very secured and the only ways an investor is at risk is saving their asset with a wallet that could easily be penetrated by hackers or fail to safeguard their private keys.
I want you know that Banks are not perfect and Bitcoin and other cryptocurrency are not perfect too. There is limit to what all of them can give you. There are people that have invested into some bank shares and they are happy they did because they bought since when some of these banks have little to no liquidity and now they have became one of the big brands all over the countries and also some continents.
Beside, msot banks existed 50 years or even 100 years before the idea of Bitcoin and cryptocurrency emerge, they were there before crypto came on board and it was because of this limitation Satoshi see that the traditional finance is collapsing and brings Bitcoin into existence and ever since the creation, the banks have been relentless and don't want their system to fail so Bitcoin wouldn't be seen as the messiah that people will embrace.