Something tells me that these alts are rallying as a trap.
Basically they want to create a fear of missing out while everybody sells their BTC for the alts.
Then the alts start to dump while BTC makes a bottom and goes to $20k
As you say, if a scenario occurs, it means that the altcoins have come to an end. I do not think I see such a hard move. I think bitcoin will rise fast and big, but this rise may not be healthy. Getting the right position will become very difficult