Shaq has made nearly $300,000,000 just from playing basketball. That does not include any endorsement deals, investments, or other sources that I'm not thinking of. Scottie Pippen (who blew all his money somehow) by comparison made just over $100,000,000 and wasn't in Shaq's stratosphere regarding marketing.
Even with all his extravagances and money sinks, I would be shocked and amazed if he is ever hard up for $$ for the rest of his life.