The boss of Roxon Energy wasn't a dunce but a greedy and crafty fellow.
Having monopolized all the oil reserves, he certainly reveled in everyone developing an almost addictive demand for oil, impossible to shake off.
However, technically speaking, the cost of oil was bound to increase as existing reserves dwindled, and humanity would eventually have to look for alternative sources of energy.
Therefore, CEO Dalio chose for his company the name "Energy Group" and not an oil company.
Oil was merely the choice of the era; his real intent was to monopolize all forms of energy that powered the workings of society.
If it was the Stone Age, Dalio would surely have tried to monopolize all the torches of the cavemen.
[Lille: It's proven that our opponent, after consolidating the company, has begun attempts to monopolize the sources of nuclear material.]