I got some schadenfreude smirks out of Millennial Robbin'-hood Day-Traders - the kind who are gonna get rich on Hertz stocks - how, the last THREE sudden market plunges, Robbin' Hood was "Temporarily Unavailable." I know, in the past, my own broker was not answering the phone when the warm stuff was being fed into the fan.
Now, as it happens, I'm only in the market for a token amount - and it's long-term money. A consolation prize if I turn out to be wrong, and Bitcoin and fiat really are better money. I can't imagine how that could be; but second-guessing me is often quite profitable.
Going back over to the title...I guess "Think or Swim" is a related feature, not the trading feature. Sorry about that...as Rosanne Rosannadanna used to say, "Never Mind."