This question resolves positively if by January 1st 2030, a comment on this Metaculus question links to an archive of the Bloomberg Billionaire Index OR the Forbes real-time list of billionaires indicating that Elon Musk was the richest person in the world at some point of time during the 2020s. Otherwise, it resolves negatively.
Acceptable archive sites include archive.is and archive.org. However, any archival site that is determined to be trustworthy by Metaculus moderators would also work.
This question will close and resolve at the minimum date of any such archive, if it exists.
(Edited 2020-07-20 to change resolve date to date of archive rather than archive posting.)