they will slowly come to 0 value.
there are nearly 2000 coins in market today. nearly 1750 of them will get 0 value in 3 years. dont waste your money in altcoins.
They will never be in zero value, devs are still looking at the value, with the bear market, most devs did not pursue on aggressive marketing.
I believe they relax and this time but could probably start to be active when seeing people are again ready to invest.