The thing is bitcoin is dropping due to the market correction and nothing else. Altcoins are dropping because it is being invested into bitcoin after seeing it in the red zone. Or there could be another possibility that altcoisn are now being traded for the fiat first as they are getting profitable investment now. One thing is sure whenever there is fall of bitcoin there is rise of alt coins where we speculate that bitcoin is getting traded for the alt coins but somehow we are not in that position today. The market corrections are the reason for bitcoin but not for the alt coins itself. Whatever it is, it looks to me completely temporary because after all the catching up the market cap is not gonna break so severely. So just wait and watch for the bitcoin to rise again and behind that alt coins will gain the dominance too.