Hasn't that happened already a number of times? If everyone was still aboard the Bitcoin bandwagon, it would have stopped being profitable long ago; however you have plenty of other bandwagons to jump into. They are all technically practically interchangeable.

I assume this is also the reason PoS will never work. People will just stay with PoW until really forced to, and if forced it's highly likely they will just jump into another PoW bandwagon. Guess this is part of the resistance seen with Ethereum. The alternative is to find a PoS schema which is even more lucrative for speculators (possible what the article is describing), and then everyone will jump into that bandwagon en-masse, but it will not have fixed anything.