Learn money and risk management. High-risk investments mustn't be your lat hope money. You should be prepared to lost your investments as much as to gain profit.
I don't think so 
). Of course there are so many risky things in this crypto world and investing in ponzi is the riskiest thing and you guys should stay away from this kind of investment but there are also many ways to earn money without investing like freelance job or join campaign in this forum. Sometimes you no need to risk your money to gain profit