A lot of projects exist for investment. But as for me altkoins are the most interesting for investment. You just need to be sure that the project is not fraud
This option is suitable when not sure about the campaign. Give that would get at least something. When the project is serious, it is better to wait a few months and get a profit much higher
Just never, never give a private key to anyone or under any circumstances, and also learn more about the company before investing. And there should not be problems