It'll be interesting to see what happens when a few people own 90% of the bitcoin and everyone else just sort of shrugs and starts using a new cryptocurrency, instead.
In this techno-feudalist scenario, being one of the Bitcoin 1% or even 10% means the world is at your feet, and if you've maintained good opsec, nobody may even know how much of their lives are your property.
Don't exchanges verify identity? Wouldn't you be committing fraud by maintaining good opsec?
Point being is that someone may eventually leak an exchange database with those details. Then the word's out. Kind of like Equifax.
It would certainly be possible to prove identity when transferring BTC in/out of an exchange, but make it exceedingly hard to prove that they ultimately make it to/from wallets you control.
But of course possible does not mean it is likely.
Plus, most people don't own that much currency anyway; they either get a paycheck (which can start coming in BTC) or an asset like a house, which is valuable in any currency.