Yes, in my case bitcoin control the market. As u see when bitcoin fall down, all altcoins follow the same as bitcoin. When it rise all coins rises up. Bitcoin makes a big impact in cryptocurrency as it is mother currency of all altcoins.mostly coins trades in bitcoin pairs..
It could be yes that bitcoin control the market. Bitcoin itself already contributed to bring investors in cryptoword. The populations of having a cryptocurreny is increases, and it really influences the new believer or investors .