I think that Bitcoin will alway be above all other cryptocurrencies. Bitcoin is first cryptocurrency and that gives it a lot. It broke the ice and showed people what cryptocurrency could be or become. Also if it was not the best, it wouldn't have the highest price. Maybe in time it will lose to some other or new crypto, but for now its first.
I agree with you, Bitcoin doesnt regaining dominance cause this is the dominant cryptocurrency that we have. This is the mother of the other alt coin which exists for the passed few years because of the time that some of the Bitcoin must be spliced for us to have an coin which will prevent the extinction of the existence of the currency, I believe Bitcoin will be dominant which is also came that when you say crypto most of the people will have the idea of the Bitcoin.