I was just thinking about this. Exposure from a short is theoretically limitless. Some sort of derivative would be a better approach? Asking for a financially clueless friend.
The financially illiterate don't understand that "going short" is not the simple reverse of "going long" and that there are more difficulties involved with borrowing stocks to short or in buying puts. Well, puts are easy to buy, at least, but the manner in which they decay makes it hard to win with that strategy, harder, in fact, than buying calls to go long. But yes, you can technically buy puts. You can also play Powerball.