Power, natural gas, gasoline, water, mobile contracts, railways, internet access are probably better analogies. They have tendencies to (local) monopolies but also a lot of precedent and knowledge on how to regulate and break them, how to introduce competition.
they broke up Ma Bell, but they've never done anything about the internet access. Mobile is an oligopoly.
I don't think so. You can't practically buy electricity from halfway across the planet but you can buy tokens. There's no local infrastructure to monopolise.