when a country's economic system is no longer running well, there will be problems such as inflation, in 1998 many countries were affected by that situation, food crises were everywhere and fiat currency had no guarantees, therein lies the weakness of fiat.
Unlike Crypto, crypto has value because of technology, but some regulations make the price of crypto go down, this happens because some crypto exchanges want to list coins on the exchange and need permission from the government, this is the problem, inflation doesn't actually affect crypto, but investors are afraid of losing or losses due to interest rate regulations issued by The FED can change the situation on the stock market as well