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.
The market will never collapse because the price is still very profitable even though it might go down sometimes, every time the market price is dropping there will be more investors who are going to hoard coins so definitely the price will still grow up, volatility is the reason why every traders are getting rich today.