And if you're talking about how much wealth he could realistically extract from Egypt, it's much much lower. Maybe even lower as a percent of global wealth.
Bezos is literally nothing. It's just that nowadays the average person has more power, and the average bourgeois has even much more power, but the old rulers could do anything.
Comparing the two is silly. But let's do it. Head to head.
Bezos could hire a small army of mercenaries and defeat any cesar/king/emperor of the past.
Also Rome didn't own any of the provinces, they occupied, governed and taxed them. Its not like they could do anything with Egypt.
The kind of army that governments would allow Bezos to own couldn't defeat the strongest rulers in the past unless he got very lucky and managed to pull a Cortes and ally with another much larger force.
If the army of the past came to present they are dead in the water. All you need is to know where their leader is and assassinate them, sniper rifle, explosives thrown from helicopter etc. You don't need military equipment, as the past people have no experience and knowledge of mode technology.
Other way around - modern army in the past - is a bit too complex (too many variables/scenarios) to write in a comment. That is territory of a podcast episode or two :)
Money is useful only when spent on something productive.