I believe you have totally misunderstood the correlation between Bitcoins and Alts, if you were observing prices you would have noticed that, as and when there's a rise in the prices of bitcoins, a similar kind of movement is seen in the alts market.

However there's something you should know, whenever alts crash they do not recover as fast as bitcoins does, so investing in alts is a huge mistake unless you're sure what you're doing.

In my experience with Bitcoins and Alts, I have always seen that whenever alts take a beating they take long to recover, whereas Bitcoins starts it's recovery faster, primary reason is traded volumes, sentiments of the community, which will always be higher in bitcoins than alts. Hence blaming bitcoins is wrong, Bitcoins is the original crypto and you should focus on it, if you already have alts then simply hodl them as their recovery will take quiet a while.