American hedge fund boss Bill Perkins is among investors reported to have made a fortune from volatile gas markets.
Now, as European prices hit fresh records and households struggle with soaring bills, he is among those hoping to reap further riches as a global bidding war rages over shipments of liquified natural gas (LNG).
His firm, Skylar Capital, has reportedly set up a new energy-focused office in London that could benefit from the chaos, with hundreds of millions of pounds in profits potentially up for grabs.
"This is probably the best time to be a natural gas trader," said the businessman.
The Telegraph says Mr Perkins is not wrong.
LNG cargoes valued at just £40million a year ago are now changing hands for £200million.
So big are the gains in the past few weeks alone that an LNG shipment that set off at the start of this month and makes port today will have seen its value double in the interim.
'Bonkers'
Nathan Piper, an oil and gas analyst at Investec, said: "It's bonkers. These kinds of record gas prices should not be happening in the summer."
The LNG frenzy is being fuelled by a combination of factors which have struck Europe all at once.
As the war in Ukraine rages on, Russia has slowly reduced exports of gas to the Continent after Western sanctions were imposed. Meanwhile, France's fleet of nuclear reactors are laid low by technical problems and the reservoirs powering Norway's hydroelectric plants are running low - creating even greater demand for gas to burn in power stations.
Alex Froley, an LNG analyst at Independent Commodity Intelligence Services, told the Telegraph: "These are all-time highs for global spot gas prices, far above anything we've seen in the last 20 years.
"We've seen some ships waiting offshore in Europe for a few weeks before delivering, rather than going straight in.
"They may be hoping to find slots to deliver into the highest priced markets, like the Netherlands, rather than wanting to deliver immediately into the UK or Spain, where prices are lower."
Holders of long-term LNG contracts are in a very favourable position.
'Insane' prices
"If you have bought this LNG on the cheap, you are the one now making the money," says Laurent Segalen, an energy investment banker. "And the prices being paid are beyond anyone's understanding. It's insane."
There was more misery for hard-pressed British businesses and consumers at the start of this week, with gas prices surging to new record highs.
Prices for wholesale gas for the coming winter rose to as much as 719p per therm.
The UK's top share index, the FTSE 100, was up 44 points at 7,523shortly after opening this morning, following yesterday's eight-point gain.
Brent crude futures were 1.02% higher at $100.35 a barrel.
No FTSE 350 companies are reporting today.