The crypto market has an high level of volatility, anyone who is about to make an investment need to have a good understanding of the volatile market.
Volatility needs to be taken into account only when trading, which allows to make money in this way or when investing for a short period of time. With long-term investments, volatility at the “intermediate” stages doesn't matter at all, but only the “entry point” and “exit point” are important.
Now the question is even with the volatility will you still choose crypto over fiat when it comes to making investments?
Investing in fiat? What are you talking about? What idiot would invest in fiat? Investments will
destroy these investments to zero or even worse, to a loss. Fiat has never been and never will be an investment tool. Remember this.
Now the answer to your question is easy to find. Of course, investments are only possible in cryptocurrencies, but not all of them. Because most of cryptocurrencies are even worse than fiat. These cryptocurrencies are getting cheaper and depreciate faster than inflation hits fiat. Worst of all, in the end begin to cost nothing at all. And here the opposite effect appears, that fiat turns out to be better than many cryptocurrencies. Although many such cryptocurrencies are simply called shitcoins.