But with TradeHill and Mt.Gox, I have been able to make 200% profit from my original investment in as little as 1 month. How long would it take me to make 30 BTC from an original investment of, say, 10 BTC, using only Flexcoin?
That's like comparing a bank deposit with gambling. You earned 200%, but it was risky. Investments with lower risks provide lower interests.