Offers that promise large profits within a short period of time. The company usually operates solely online and it is difficult to determine its reliability.
If you participate in such a fraudulent "investment" and pay in money, the fraudsters will repeatedly promise that everything is in order and that a lot of money will be paid out soon. Sometimes, smaller amounts are also paid out to build trust and encourage the victims to make larger investments. In general, it should be noted that promises of large profits within a short period of time (and without work) should typically be considered "too good to be true".