There are many ICOs. The phenomenon, that started three years ago, has become very accessible due to Ethereum based ERC-20 tokens. After you’ve learned how to identify a good ICO, in the following list you will find 10 red-lights for bad ICO investments.
4 – Hard cap is huge: other than a very few cases, an unlimited cap or a very-high cap means huge demand is needed to make up a secondary market (or exchanges). No one will be waiting to buy the tokens on the exchanges.
For me personally, i think the hardcap was depends on the profile of the token itself, the distribution, tokensale price, and the benefits or goal of the ICO itself.
sometimes there's an ICO which is that have a good partnership and the need of the token was real. so its still normal if the hardcap was huge, but as long as the Pre-ICO sale could sold so fast, i think its still on green-light of good ICO