Except for 50 million worth? As I said, it would make no difference to his actual possessions.

Obviously. His net worth is what he can sell it for. Hence, he could donate... maybe 500 million? Hell, he could donate 950 million without any change to his lifestyle at all. He would still have 50 million (50 000 000 usd worth) and can still own his dozen private jets on his private runway, maybe even buy one or one hundred new private runways for his buddies.

It's not easy to buy one or two fewer private jets for your private runway? Get real.

The commenter probably needs his money. This billionaire does not need more than a billion dollars. Spit on the homeless for not donating the shirt on their backs. For the billionaire this just means buying one fewer private jets, less than a dozen, maybe only eight jets, for his private runway.