The Bitcoin blockchain, despite its imperfections, is the most secure blockchain there is to day, and it can evolve.
All other coins would crumble if they faced the same circumstances that Bitcoin is currently facing.

Bitcoin can't evolve as fast as other coins because there are no centralized entities to make decisions for it and thus everyone has to reach consensus to move forward or nothing happens. It took us a year to get SegWit and services aren't even adopting it.

If let's say Litecoin was the #1 coin, there would still be interests and politics involved just as there is with Bitcoin today.

Should people start to switch to other coins, Bitcoin's transactions will drop and so will the fees, thus the problem solves itself and people come back to it.