Top is in. But like... for realz.
BIL, who is almost professionally ignorant, now wants to buy stocks. The things he is saying make it clear he has NO clue how even the basics work, but he he seems convinced he can't lose. After all, the WSB dudebros did it! (BIL likely doesn't even know what WSB is, and surely couldn't explain even the basics of shorting--would likely think you meant 'sharting'-- but has probably heard stories about lots of regular people making lots of money. He's 'regular people' and he wants more money, so of course this should work out well!)
Sell, my friends. Sell.