I only found such info about Jeff and bitcoin, looks like it`s just rumours, unless you have other confirmed info, the one below is from sept 2020:
Jeff Bezos is the world’s richest man with a net worth of $130 billion according to https://www.forbes.com/billionaires/#583760cf251c list. The founder of Amazon, the e-commerce colossus, has been rumored countless times to have invested in Bitcoin. Plus, https://www.forbes.com/sites/billybambrough/2018/12/10/a-bitcoin-exchange-boss-thinks-jeff-bezos-will-trigger-the-next-bull-run/#7bb3ebc24acb Changpeng Zhao has been quoted saying that he expects Bezos’s online retail giant to be the catalyst for the next Bitcoin bull run.
However, none of the rumors have been confirmed, and Amazon has denied any plans to accept Bitcoin or any other crypto on its platform. The only blockchain-positive development associated with Jeff Bezos is amazon’s cloud computing arm https://www.cnbc.com/2018/05/15/amazon-is-moving-into-blockchain-with-a-new-partnership.html with a blockchain startup called Kaleido.