Go figure, but it was a great investment at that time.
I don't understand the connection. And one thing is a big problem: Of course, a ponzi or a pump and dump scam can be a good investment. But for whom and for how long and at which cost? This is never productive work or a win-win situation, it's always a win at the cost of others. It's never a win for all.
In a lottery, it's the same - but in a lottery you know what you are dealing with. In a scam, you are lied at and deceived. You are the prey which is lured into the trap.