There are problems coming, that is for sure. The Bible predicts it.
Higher commodity prices are here for a number of reasons. The US dollar is the currency of the world. Maybe not for long, but it is now. Oil prices are in dollars, not pounds. When a country is not on the gold standard, then what is backing their money? Their good name. So, the US has been the great economic power in the world for many years. But, when the government begins printing money without prudence, then what happens to the dollar? Well....if yesterday there were three trillion dollars in circulation and today that doubled, what would happen to prices? When large sums of money are printed, then the value of the dollar goes down. It takes more money to buy the same thing. This is one reason why oil prices are going up.
But, as is being pointed out, there are some who find that speculating on commodity prices can bring large profits very quickly. This can also end up a disaster for investors if things don't go as planned. When the US government has not been good about paying its bills, there are many today betting on inflation because of the huge increase in the money supply and borrowing. I think they have a point. But, if the economy continues to get worse, then maybe there won't be inflation and prices will begin to drop again. Or, maybe if the government keeps spending we will have high unemployment and inflation. It seems like a very real threat.