Bitcoin has a non Conservative way of exerting its superiority over altcoins and the cryptocurrency market in general. The recent dump in bitcoin prices made over 95 percent of altcoins loose value in huge percentages and sadly some are not quick reactors to positive btc movements and might likely remain low for a while
I think bitcoin won't kill altcoins, because the market is different. Bitcoin is collected by rich people who have a lot of money so that for them the price of bitcoin which reaches thousands of US dollars is not a problem as long as trading results are profitable.
But altcoins that have prices of hundreds, tens, and even those below one US dollar are certainly opportunities for crypto traders who have little capital. While the profit percentage can be the same as bitcoin or even more.