It's very difficult to say.
Right now, bitcoin is entry point for many new people in the crypto world.
They first hear about bitcoin, invest some money here but later move to other alt coins.
If high fees remain in btc transactions, and confirmation time continue to prolong, some users will give up from bitcoin completely.
If such trend continue for a long time, it can seriously affect bitcoin domination now.
We will see what happens.
I agree. This can really result in not just the fall of bitcoin but the fall of the whole crypto world. Because if people who just heard of bitcoin try to invest and use bitcoin, they will surely lose interest which may lead to them turning a 180 degrees away from the whole crypto world. But some may also move to alts if they have studied a bit more about crypto. Bitcoin falling and being replaced by another crypto currency. That is, if this trend continues.
Good thing lightning network is working to fix the major problems of bitcoins which can turn the tables around and make the bitcoin secure its position on top and remain the king of the cryptos for a very long time.
That is what i think.