He's a TV personality. Whatever he says, I always see him on TV.
As to the tweet you linked, I'm starting to suspect laundered synthetics are little more than a source of life support for short manipulators. I.e., I'm wondering whether simply "hodl" may be better for forcing resolution of the short manipulation issue, more than "buy and hodl".
Moreover, I have no clue why Gensler won't suspend dark pool trading. Dark pools are utterly useless.