Bad economy policies, inflation and a lot of bullshit has rubbed off on fiat over the years and that is why a lot of people stopped trusting in the system a long time ago. As long as in the long term, you believe that whatever you are holding is good enough to give you the same value back or more value based on its usage and adoption, then it is a store of value. Unfortunately, this is one thing fiat could not give and then we saw crypto bringing.
Fiat just keeps on deflating in value that's why cryptocurrency is an ideal investment because it can be directly use as a mode of payment and can be an asset too. Although it is very risky, many crypto enthusiasts are still interested in it because of the possibility that it will become big in the future. It is already big now when we look at the total value of the cryptocurrency market but it would become bigger when more people are involved with it. Some would become store of value while others would be use as currency.