Don't take my word for it but ICO is one of the best way to earn if you are just a short term trader. Its just not applicable to teams who releases the tokens along with the bounty participants. But consider this, if you invested to an ICO which the project offers good future, it could mean there will be a lot of investors to it. Project which are backed by known individuals in the cryptospace with a team that has proved themselves reliable even before the ICO started.