Could you please elaborate on this? Suppose, I have x as my savings, should I invest only 30% of that in each of these and hold the rest in cash? Is that what you meant? Thanks.
It just shows the importance of diversification and mitigation of risk, and real diversification, which means that you aren't diversifying between 5 oil companies stocks, but different types of assets, maybe even contradicting assets, so it hedges you a bit just in case one goes down, the other goes up.
So tha greatly reduces the risk of the OP losing all his money(it can still happen) meanwhile give him some time to figure out things by himself.