anything can happen in crypto. including the price of BTC which can drop by more than $3500.
but I think if that happens there will be a lot to lose. including altcoins with very good projects will be affected by the decline in btc prices.
it cannot be ruled out that the role of btc in crypto is very influential. except usdt which will be expensive if btc goes down.
I hope btc will continue to fly high above ATH in 2021