Well I didn't say I think the alt-season will start now! You said you don't think it will happen at all, but I expect it will be shortly after BTC hits its next cycle high, similar to the last time. If bitcoin hockey-sticks up well into the 6-figures as many people expect in a year or so, then at that point people will start to take profits (and there will be a LOT of profits!) and look for other places to put them.

Also I don't expect people to sell all their BTC, but if you bought at sub-$10k and it goes up to $100k, a lot of people will take a small chunk out which could translate into a lot coming into alts.