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.
I dont think this is possible right now that nothing is created a kind of cryptocurrency which can surpass the essentials of bitcoin. The market is experiencing a price depression and this is not the first time actually this has always been the trend but just as before it can surely recover.