> Which is odd as it directly goes against his own interests.

His recent interest is power. He can use that for profit later in many different ways - he's working on firing people who wanted to investigate his idea of using X as a payment network, for example.

That is a reasonable explanation. He is well past the point where people want money for spending power. Any billionaire is after power and status.

> The richer Elon Musk gets, the more he (appears) to use that wealth to skew politics towards anti-"eco" policies

Which is odd as it directly goes against his own interests.

It goes against his image, not his interests. These are two very different things.