Climate activism has intensified in the past few years as the planet warms to dangerous levels, igniting more extreme heat, floods, storms and wildfires around the world.
Elon for example is worth 180 billion. His private jet, which costs $17k/yr to refill, is worth $62 million, or 0.03% of his net worth.
The average person, maybe lower middle class to middle class, is let's say worth about $250,000. If they bought or leased a car worth $45k, that would be 18% of their net worth.
It is probably the equivalent, or LESS than the equivalent of someone in the middle class, buying a candy bar. And they can do it over and over again with no repercussions.
And jet fuel is incredibly pollutant, and billionaires pollute millions of more times in general than the average person.
Liquidating is also stupid. That's not how they access their wealth. They take out loans, using their equity in companies as collateral. They don't sell off their stocks, because you have to pay taxes on that.
Realistically, people like Elon Musk have unlimited money. Some governments aren't even worth as much as him. He could buy governments and control people if he wants (which is what lobbying basically is).
If he wants to make more money he just has to pay the right people and do a little dance. Liquidation is in some cases completely irrelevant.