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?
Yes, majority people right now invest in cryptocurrency only because they saw it as a good way to get high ROI and not for the 'so-great currency' as the way it tries to sell to us.
But that's because of the unstable and variable of cryptocurrency in terms of price. There are people using it for the 'currency-ish', a bit low but still there as a minority number so nothing to worry about.
Heck, if USD, gold or silver somehow become unstable and variable in price, I'm willing to bet there will people start to hoarding them as well.