BTC doesnt control the prices necessarily given how much of the market it control 38-40% it sways some opinion but there has been plenty of coins/tokens that have depreciated while BTC prices rise and as BTC has dropped plenty have seen gains or a tad more stability soon BTC will have far less to do with any of that as cryptos become more mainstream like BTC but I wouldnt say watch BTC when making decisions on purchasing/mining etc.