ICOS are completely safe if you do research before investing as long as you are smart about it i.e.

For research: look into the whitepaper, you ask the ICO you are interested in, look at the team and what they are trying to achieve etc. If you throw money into a poor project, don't be surprised if you don't make any profit or they go under.

Don't throw too much money - Spend within your limits. Slowly build up your portfolio.