First of all, investment has a time period. It's not that easy to get 30 thousand with one investment. This is three times. General funds, online treasures, bank savings, etc. The annual rate of return does not exceed 10% at most, which is very low.

Even if you speculate in gold foreign exchange (high yield), it will take several months to earn 10 thousand with a yield of 20% a month. So don't invest too much, every little makes a mickle.

I guess you met a liar. Look at the current investment projects, it can't be so high.