It is good because they can rise very high if they have a lot of support so its worth to do a investment on these ico's. Before that you must need to research everything about this ICO.
Search about their team,whitepaper etc. If they have a good project this can maybe worth something.
But as much i have seen it as soon as any new altcoin is released and when it got listed in exchange immediately the ICO investors are the first to sell their shares as they have bought in discount price and when bounty coins are distributed the price of that new altcoin goes below the ICO price and it takes time for that altcoin to recover it back as projects are finished after long time. So if the coin is really worthy it is better to invest when the coin is dumped heavily and buy it in bottom price so when it rise it you should be able to take profit.