previously Altcoin can do that without following the bitcoin price movements, I remember when in 2015-2017 Altcoin movements were very fast. almost every Altcoin can produce even though BItcoin is not moving (stable). And it is very profitable for day traders. but the current pattern has changed. where Altcoin really follows BItcoin prices. and for now, it might continue to follow the price movements of Bitcoin I guess