Never, you're wrong 
Are you sure?
Because there is so many people who bought ETH for $0.25.
For $2
For $10
So if I buy it now at $1500 arent I dumb?
Before I can ever make a profit all those people who bought it cheap will cash it out no?
Do you know what is the meaning of scam?
If the people profti because they buy when it was low price and sell it now when very high price is not meaning of scam.
Scam mean the project developer go away without news and bring the money with them. Correct me if i am wrong.