I could also limit it to one or two bets per user or increase 10000 limit. Let's see how it is assumed in the current form.
Better to allow multiple bets, that way less people try to just barely out/underbid others. You could still create more Memo accounts to get around bet limits anyways
Maybe require larger buy-ins for greater decimal precision? That way it rewards early/imprecise guesses, and prevents people guessing 0.0001 more/less than everyone to game the odds