This encrypted winter is long, and I believe most people and altcoins will leave, and only those who remain faithful to the Bitcoin and insist on digging are likely to stay until spring.
Yes, a lot of altcoins are completely worthless, they are just diluting the value of bitcoin. I think that only investors who buy bitcoin without worrying about the short-term market can win the future. The death of the altcoin has already appeared, and many coins have not followed the bitcoin rebound!