I like to speculate in assets not correlated to the stock market or really any other market. Although it seems that all commodities can only go in one direction right now, that's not always the case with gas. Fortunately, another ETF product has been brought to the market so that us mere mortals can trade unleaded gasoline. Victoria Bay famous for their oil and natural gas ETFs have rolled out another single commodity ETF that tracks gasoline.
A couple of things to be aware since it appears that this ETF is structured pretty much the same as their previous ETFs. The ETF is set up to track the change in gasoline futures from day to day. So if the futures are up 1%, so should the ETF. Like many ETFs that track something (S&P 500, Dow, Gold, etc), the price of the ETF can nearly relate to the index it's tracking. For example, the SPY is 1/10 of the S&P 500, GLD is 1/10 the price of gold, etc. The ETFs from Victoria Bay don't have that sort relation. So it's not easy to tell from a price standpoint how things tracked on a given day.
The bigger issue, that all futures based ETFs have to deal with, is backwardation and contango. Gasoline is in a pretty significant contango environment right now. The front month (March) contract is about 15 cents cheaper than the April delivery. Since the fund holds futures, eventually they'll have to roll to April at some point. When you have to pay more for essentially the exact same thing, you've lost money. This is something any futures trader would have to deal with, but may be foreign to those who would think over time that the ETF would track the spot price with a great degree of accuracy. If you want to hold this ETF for some time, you may want to let it trade for awhile and get an idea what the tracking error to the spot is going to be. And if you're not familiar with the terms contango and backwardation, I'll explain briefly, but highly recommend you understand it throughly before investing in futures derived products.
Backwardation is where the price of a futures contract further out is cheaper than the front month or spot price. An inverted yield curve is a good example of backwardation. If you're going to your bank for a CD and they're paying you more annually for a 6 month CD than a 12 month CD, this is a case of backwardation.
Contango is the exact opposite and is the case for the gasoline markets now. It's going to cost you significantly more to own gasoline for 60 days than it will for 30 days.