Yeah this might be true, but in that case the one with the most tokens/cash will win. Not everyone will buy 5000 tokens just to be able to bid for players, and you will still loose your tokens when you win. So if a bid goes on to 1000 tokens and you finally win it, you will lose 1000 tokens(the one who lost wont loose it tho). So therefore I dont think people will go on bidding forever.
I dont know if you missunderstood me but I dont mean that the player that wins the bid will get the money/tokens back ofcourse. Only the ones that lose it.