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.
Too fast to mention the bitcoin market is about to collapse, bitcoin is very strong and it is unlikely that bitcoin will collapse quickly. It's just negative thinking that is too panicky with the situation.
In reality no one know about the future of bitcoin but still people keep talking, either good or bad but they talk about it and I think these are just negative thoughts of some people about bitcoin that its price is going to decrease now. This roomer not a new one, from the very first day some people were saying that the price of bitcoin will decrease with time but it didnt and I think the same thing will occur in the future.