Currently, person with highest amount of bitcoin in the world is Satoshi Nakamoto and he is the 12th richest man in the world. Can his number one spot be taken by some other person anytime soon ? Who can be that person to replace Satoshi ? Elon Musk ?
For now, no one can beat Satoshi in terms of Bitcoin holdings. Although it may happen in the future, I think it is far away.
Elon Musk may not have expressed interest in taking this place yet. He has not shown any interest in ruling the Bitcoin market yet or he has not expressed it.
However, if you had mentioned Michael Saylor's name here, it would have been somewhat appropriate. Because we have already seen how interested Michael Saylor is in Bitcoin holdings and how he is doing it.