Why do you think this is a problem? "Overbought" is a speculative term for day traders who want to sell ASAP, lol.
Sorry I don't daytrade, maybe it's just you. Why do I think this is a problem? I'm just trying to protect my potential investments from being relentlessly diluted, that simple.
IMHO, if you truly believe in the project's potential you want as many other people to take part as possible for bigger network effect. Caps are like soft private sales - you restrict the number of potential backers and users in order to make 10 people rich. It's all in the family.
By setting up a crowdsale, you are already on your way to make 10 people rich, let alone the campaign itself is uncapped. What about someone who's broke and couldn't afford to participate in the crowdsale? If you truly want as many other people to take part as possible for bigger network effect, you should go ahead and set up a faucet or airdrop the tokens instead.