Look at what happening around. The first cryptocurrency bitcoin was invented to reduce the hassle of third party and have borderless transaction. Isn't it true? Now, look at what happening. People are more into investing it than using it as currency.
Most interesting is people are most interested in coin which give more ROI, they are not interested in the currency-ish of a currency.
For example, some people are talking a lot about BSV, but if they have some research, they will never take it as currency, but as this is giving a good return now, it's best for them. Why man? Why don't we look into a decentralized coin? Why do we only take it as investment? Did Satoshi ever take it as investment? Or he invented Bitcoin for borderless payment and solution to the intermediaries problem?
This has been debated before and there are idealistic people that believes that cryptocurrencies will fully replace fiat in the future. Realistic people meanwhile can only see up to the point where some strong cryptocurrencies can coexist with fiat. It is difficult to determine what will happen in the future and whatever vision you believe in, I hope that the industry will still survive because it helped many people and opened up new opportunities to change the market.