because it is not profitable for investors to invest in the project in dollars, and many investors keep their savings in Ethereum and bitcoin-which have fallen greatly in their value
Let me disagree with you. The theory of the differentiation of risks in investing involves the storage of part of its portfolio in Fiat. Therefore, many investors are now just for Fiat, as investing through the Etherem or Bitcoin is not profitable.
If we are talking about the cryptocurrency market, then at the time of a drawdown, investors are better off transferring their deposits to fiaty. But if you are generally talking about investing, it is not always beneficial to keep savings in national currency.