Absolutely my friend. In fact there are no black swans or "crashes", only traders on the wrong side of the market.
So you don't look at the market in any statistical framework?? No belief in distributions,skew,kurtosis, standard deviations or ATR/Vol Bands?? Im guessing you don't trade options
The only true statistical/mathematical abnormality is that freely-traded financial markets do trend (fat tails), that's why trend following techniques are so robust and consistent. The other statistical abnormality that the trader can profit from is the seasonal pattern found in some financial instruments, especially the agricultural commodities, due to planting-harvesting cycles mostly.
I think choosing commodities to trade is more of a personal choice. Based on what you are interested in, you can choose the one to trade.