It is going to be interesting.
I agree - everything is still speculation. In 50 years we'll have a good idea of how cryptocurrencies worked out. It still comes down to the fact that PoW coins can't survive without miners, and the miners need to have the expenses covered. What the market actually does is completely separate. As long as I break even in 10 years of dealing with these things, I couldn't care less what the coins do - it's all in fun and any profit is a bonus.