Actually Bitcoin price often influence altcoin price but there's a season where altcoin do extremely well even when Bitcoin is stagnant or declining. What if this season comes More often, what will be the faith of Bitcoin?
When Bitcoin declines or in bear market, altcoins can not perform well and in many years cryptocurrency market proves this fact. I even don't want to argue about it with you and others as history shows it very clearly.
Don't buy altcoins because they're top altcoins.In bear market, top altcoins decline considerably like 90% and more from ATHs while weak altcoins can die very easily in a bear market.