I don't know, altcoin marketcap dominance chart has been kind of unpredictable in the past, i wouldn't try to chart that at all. Sure it can go up but that can be because of various different reasons. The whole movement for PoS is driven, not only by enviromental reasons but reasons for saving energy because of the uncertain situation in Europe. And i am starting to think that even the flippening has a real change again pretty soon and BTC could lose the marketcap dominance. I know this has been predicted from the start by some people and their predctions have failed so far, but i think that we are entering to whole another era now.