Another good saying in the investment world goes like this: only invest the amount that you can afford to lose. A better approach is to read and research the origins and merits of the coin or project you’re about to buy into.
ICOs, like any investment opportunity, should be approached when you have all the information in front of you. Study the team’s experience, consult experts, and cautiously sources online ;), and the project’s potential.
Above all, evaluate returns and the offer with care and objectivity. If increasing your investment by 4000% in two weeks sounds ok to you from a project with a weak team and no running prototype, please familiarise yourself with Eisegesis.