My opinion is that in time Bitcoin market share will keep reducing, as many other coins and tokens and platforms will keep surging.
In the long term, the blockchain technology is very disruptive. Bitcoin will more likely compete with Gold, Ethereum will provide a backbone for many uses.
So I am not really sure a collapse is incoming, it depends if a real bubble will quickly form.
Bitcoin can survive and will not collapse so easily, bitcoin will be able to rise at a better price, and remain in its popularity to be the main crypto coin.
I don't think bitcoin market is collapse although bitcoin price is at the low price, I am sure that soon, bitcoin market will rise again and the price will reach the highest price. just be patient and enjoy the ride and make sure you can buy another bitcoin or at least you are trying to collect more bitcoin from many ways. don't forget to always check the price in all market and make an analysis of the price so you know where the bitcoin price wants to go and you can make your decision.