1) SPACs...Special purpose acquisition corps. Basically a closed end fund that is looking to buy actual business. Check out CLII and BBIG. Crazy moves
2) Anything with big short interest. Check out BB and GME. Blackberry and Gamestop. Apparently Robinhood retail investors talk up these runs on the shorts in chat rooms and then goose them really hard. GME was at $5 in Sep and touched $159 today...now down at 72.
3) Anything related to batteries or electric cars.