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?
I get your point. Maybe the reason why people takes cryptocurrency as an investment and not as a currency because of its price value. Why? Because for many people specially for those who are just new into engaging to this industry we are all currently into sees cryptocurrency as a way to get a big feedback of money through making investment and not totally as a currency at all. It is true that cryptocurrency supposedly be used as a currency to provide a cashless society that can make payments for an instant making it easier for everyone. But as time passes by the main purpose of crypto as a currency is somehow being set aside because its value is getting bigger which makes people perceive it as a good investment rather than a currency. What the main importance is thar even people have different perceptions and usage on crypto, still they are using it for good and that is the most important thing that cryptos are being effectively used by people whether as a currency or an investment.