And take in mind, most returns are relative to your initial investment, if you reinvest your profits so you have a static % 'at risk' the bad results will hit y

And take in mind, most returns are relative to your initial investment, if you reinvest your profits so you have a static % 'at risk' the bad results will hit you harder than the good ones. Lose 50% and you need to make 100% RoI to get back to the start. Win 100% and you only need to lose 50% to get knocked back. And there are also catastrophic losses, if you play it too risky, where you won't have enough to continue investing after a particular hard hit.