If you mean crypto investment, then first investigate the investment opportunity, find the project team behind. So here a critical approach when exploring profits and promises of high percentages is very important to analyze. Don't immediately target to become rich, if I get a little profit from me it's worth it.
Most scammer gives too good to be true offers. So we better know what are the things considered too good to be true stuff. Things like doubling our money in just a few days, company that offers high daily interest and people making unbelievable promise of making us gain huge profit by investing on their projects.
In addition here is some information taken on the internet that can help us recognize and avoid scams...
How to Recognize an Online ScammerWays to spot and avoid scams