When everyone is a maximalist ? what does that indicate ?

So this youtuber guy has been XRPArmy for almost 2 years and I haven't watched his stuff in about 6 months , today I played one of his vids - Coins I am buying in 2020

and what do I hear - he is mostly going to buy BTC and little bit of Ether

To me this means all the alt coiners have left the field and BTC dominance has to go down from here (currently 69%) and thus follows the alt season. 6 months timeframe

What do you guys think ?