Wheat is down 37% from that peak.
So the lesson is to check the dang TAP before making an ETF trade so you aren't left holding the bag.
You could even short the over-priced ETFs, and go long the underpriced ones. Just make sure you're INFORMED and not trading by the seat of your pants. And for the love of all that is holy, stay away from anecdotal evidence.
Disclaimer: The results listed herein are based on hypothetical trades. Plainly speaking, these trades were not actually executed. Hypothetical or simulated performance results have certain inherent limitations. Unlike an actual performance record, simulated results do not represent actual trading. Also, since the trades have not actually been executed, the results may have under (or over) compensated for the impact, if any, of certain market factors such as lack of liquidity. You may have done better or worse than the results portrayed.