Chances are you didn't get to be a billionaire by throwing away $5k if it's easily recoverable.
If you're spending your time saving easily recoverable $5ks, you might get to be a millionnaire but you will never get to be a billionaire: it's totally irrelevant on that scale.
Equivalent statement: You don't get to buy a house without picking pound coins up off the street.
Even better chances are you probably did a basic cost analysis and didn't just go based on hunches.
And best chance yet, you probably inherited the billions.
Not all billionaires pulled themselves up by their bootstraps