Alt season opinion

This is not meant to be FUD. I’m just curious on other people’s perspective. If a very large portion of the money going into BTC right now is ETF driven, is there a chance that season won’t be as big? Because that money will stay in the ETF? don’t ETFs kind of just sit there like a mutual fund? Rather than the previous norm, when it would just be people that would trade it into the alt coins as soon as peak BTC euphoria comes in? I'm curious if that might be a situation to worry about. Something that hit my mind, and wanted to see what others thought. Thanks!