There are so many variations on this (very old) scam, and somehow otherwise fairly smart individuals keep getting taken by them...The simplest version involves something like getting invited to a "party" by folks you know where a pitch is made, while at the same get together a number of people receive checks for generous amounts supposedly representing the first dividends for "early investors", and everyone else is supposed to get caught up in the excitement and happiness of a supposed "sure thing" and put their own money in. No matter what, in this and more elaborately "corporate" versions, the idea is to play on people's greed, of the common desire to " get something for nothing". I saw some friends get suckered in one of these just last year--practically ruined our friendship when I tried to warn them; I was berated for my negativity, told I didn't know anything about it, didn't know what I was talking about, etc. Needless to say, it turned out badly for them (now they're just embarrassed--and significantly poorer). You know what they say about "If it's too good to be true"...
(A convicted large-scale con man I once interviewed for a documentary, a fellow who now works for the government helping to trace and bust such schemes, told me the "con man" isn't called that because he goes after YOUR confidence, but rather because he gives you HIS, to all appearances, and in return, in your naivete on the one hand and blind greed on the other, rush headlong to surrender yours entirely...called it "a strange quirk of human nature".)