Nope. Imo the point is to avoid cryptobro bots and the like, not invite them.
Plus crypto is volatile and you'd have to manage it a lot more to keep it pegged at "expensive enough"
And even then, you won't discourage a troll who just happens to have an absurd stash of coins without pricing out legitimate users. A bot farmer with 50k in bitcoin would drop a few hundredths of a coin just to make your day worse.