Renowned energy trader Mark Fisher on Thursday forecast that a string of unseasonably warm winters will break and send natural gas above $4 or $5 per million British thermal units.
Natural gas prices have remained locked in a range between about $2.75 and $3.25 per mmbtu, but Fisher believes in the next year or two, winter temperatures will return to normal levels and push up fuel costs.
"At some point nat gas is going to trade with a four-, five-handle on it and surprise a lot of people," the MBF Clearing founder and CEO told CNBC's "Fast Money: Halftime Report."
"In energy, natural gas has the potential for the most upside," he said.
Investors who bought into big-cap natural gas players will be rewarded for waiting, said Fisher. He declined to offer his stock picks, but did say he isn't certain the heavily indebted shale pioneer Chesapeake Energy would survive.
Chesapeake did not respond to a request for comment from CNBC.