If you are talking about to choose coins from ICO project, it means you should make your own research first before deciding to buy the coins. Analyze the company legality, the team member's track record, how potential their products, and some others crucial things. At least, do not choose the coins suspected a scam. It's too risky.
The risks is always here, there is no way to lose it because risk is everywhere. More risk if you are investing in ICO's even the in a coin that you doesn't have a research about the coin. It's true there's a low risk if you invest in top coin that had a great potential.