It is much easier for altcoins to fall in price than to rise. If something has fallen in price 10 times, it does not mean that the price will soon return to its previous values. There are plenty of altcoins that once cheapened, never managed to repeat their former success. So I'm not sure that Solana will be worth as much in the future as it was worth in 2021. It could be the same story with XRP, where the price of the coin will never reach ATH for many years.