You can invest on altcoins, or gambling but it is very risky. We should be more cautious on investment, there are so many scams.
the risk is always following wherever we invest. but for me when choosing investments on altcoin and gambling, better choose altcoin. you can trade altcoin or investment in the project altcoin (ICO). risks can indeed be a scam. but you must be smart in choosing the coin, you have to see if they have a good project and some good support.