What if all possible bitcoin wallets are owned?

[ranochigo]

I don't think that it will be going to happen.

You might be careful with posting in multiple threads with very small posts that don't add much and having something in signature, it's kinda asking for a ban.

If anyone want's to see how many wallets there just try to do a vanity address. You will see how many address's you generate if you are using GPU's.  And getting one depending on how many variables can be very very hard.

I use cold address's and sleep safe at night not worried about someone getting my address.

Vanity addresses are largely dependant on luck. Even though math says it's 1 day, it might just take 1 hour or 1 week. If a collision does happen, your cold wallet won't save you. It could also be compromised if the RNG used is weak.

[a7mos]

I think we can think about it after hundreds of years
The available adresses are uncountable

[Brewins]

I think we can think about it after hundreds of years
The available adresses are uncountable

after some thousands of years if an alien civilization with thousands of quatrillions of inhabitants invades earth and adopts BTC as official currency.

if such scenario would be feasible even after thousands of years,  I think most of addresses would have been bruteforced by now