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 will not easily collapse easily. Bitcoin is the strongest coin and will survive in the long run. Do not be too negative about bitcoin, because it will hurt you.
Being negative in bitcoin won't actually hurt me but shall give me a sign to take heed in any action I am in with bitcoin. I, personally am not against bitcoin or what. But we have to be careful as well and be prepared. Of course we don't want to just wait for bitcoin to recover, upon waiting, we have to make actions so that we are sure to earn at the end of the day.