I do not think that something critical has happened to Ethereum. Just dropped the cost of coins. But now almost all the coins in the market are faced with this situation. But in any case Ethereum has the necessary potential to restore its prices in the future.
I agree with you, indeed the whole market has gone down, but not all the coins fell more than 10 times. Ethereum was compared with Bitcoin, but in the end Bitcoin fell by 3 times, and Ethereum by 10 times.