I own Bitcoin. I use a lot of other stuff.
Think about it like this - my rent is $14,400 a year. If I bought a house in my state at the median price and paid the median tax rate (1.62% plus local taxes) I'd pay $8,190 a year.
Either way, if you don't pay those you're heading out on the street. Doesn't matter if you call yourself an "owner" or not. Doesn't matter if it was in the terms of the agreement beforehand. You know that people vote to increase taxes right? In 30 years I can guarantee you'll have a different agreement.
So I'd spend 4.5 Bitcoin to pay $6,000 less a year and have the same life, or I can keep 4.5 Bitcoin and "own nothing". This also doesn't even factor in the reality that 90% don't pay cash and probably owe interest to the bank, who are the real owners.
Ownership is about control. If I told you that you can have Bitcoin but if you don't give me 1% of it's value every year I'm coming to take it from you, would you call that owning it? Hard reality, but it's the reality.