Practically it's impossible to own Bitcoin by everyone because there are many barriers. If someone own few Satoshi it's still like owning Bitcoin. I don't think topic is useful and a matter of discussion but if would be better to discuss about maximizing Bitcoin adoption.
Why everyone can't have Bitcoin?
Why everyone can't have Bitcoin?
- Everyone in the world don't have internet connection and knowledge about internet and digital technologies.
- Even some of country don't have electricity in all area and it's a must to use Bitcoin also internet connection.
- Everyone will not be interested to use or to like Bitcoin and no one can force them.
- Even some will not like to have Bitcoin because of its higher transection fees and some dislike it because of its volatile nature but it's a properties of Bitcoin.
- It's still illigal in most of the countries and government discourage to use it. If they legalize it many people will be involved with it and mass adoption will increase but practically it's not possible to own it by everyone because it's just an imagination and illogical.
The like or dislike, government approvals, internet all these doesn't matter in this case because the question asked by the OP is hypothetical and merely expression of mathematical problem. I mean other factors that you listed do matter in "adoption" of Bitcoin but that is entirely different course of story. Also just to point it out, though every person in the world doesn't have access to the internet then also the internet connection has reached to almost every continent and country.
If you checkout the statics of 2022, then by means of % a map shows that almost every country has at least some parts where internet has reached. If Bitcoin ever got punched in the world with full legality then definitely others will onboard themselves for using the internet in no time.
Just like every person on boarded themselves to use the fiat even though many of them don't know what internet banking or mobile banking is, but they still did!
Reference to the internet stats:
Image credit: By Jeff Ogden (W163) - This SVG map includes elements that have been taken or adapted from this map:, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=19202338