Just the regular crypto traders with broken paradigms who believe because bitcoin rallied all the other coins must go up as well. So they put on a ton of leverage and try to chase gains in the altcoins. It's the most fiat, highest time preference thing one can do but it some ways I don't blame them as pushing further and further out the risk curve is an imbedded incentive of the current system.
I am not a fan of Pomp but I did listen to his episode with Lyn and she talked about this as well.