Hmm. Doesn't include ongoing costs. The yacht for example will cost $1-4m a year simply to own it, and that's ongoing cost forever. The jet will have a similar figure. A $45m mansion isn't cheap to keep running either. Purchase these things and suddenly you're on an unsustainable financial path with a $1b completely liquid net worth. Forget about charitable giving. $20m of gifts annually put you deep in the red.