I can see many people in social media who knows that the investment scheme is a scam but they will still invest in it because they know that it will be paying for a while to attract more investors. They will say that it is a newly opened investment company so join now unless you want to lose your investment by investing later on. They obviously know that it will be gone later on but still hoping to earn from it.
There are times when they got lucky because they were able to get back their investment and it is still paying but for those who invested recently, they will be doomed because they would not be able to get back their investment. This is just pure greediness because some people do not think of others losing money and all they care about is earning from it and continue convincing others to join.