Step 1: Recognize that it is impossible to become a billionaire without a failure of morality and an abrogation of one's responsibility towards basic human rights.
Step 2: Realize that when a person has once declared that money is more important than morals, they are likely to do so again.
Step 3: Be unsurprised when Bill Gates abandons any commitment to ensuring the continued health of the planet and declares that the climate change crisis is overblown.
There are no good billionaires, people. There are only the ones who are aligned with humanity for as long as it suits their immediate interests, and that never, ever lasts long.