Rather than answering the question about 'can', which has already been well answered, I will answer about 'will'. Not everyone will have bitcoin, which renders the hypothetical question meaningless, although if this hypothetical scenario were to occur, everyone could have some bitcoin.

Not everyone owns shares, houses or gold, so I don't see everyone owning bitcoin, and even less so if it is being acquired more as a store of value than as a medium of exchange. There will be enough bitcoin for everyone who wants to acquire it, and at a pinch it could be further subdivided, as has already been pointed out, so there is no problem.