Invest only what you can afford to lose, but is there any amount of money that's not painful when lost in a wrong investment? Those are safety tips to reduce how much could be lost if an investment goes wrong, but there's also another theory that says if you don't take risks, you can't break some limit; you will keep on rotating in just one level, which is why some people take a greater risk, allowing the greed in them, which is in disparate needs, to break through above their present financial level.