This transaction was actually facilitated by chamath palihapitiya who paid USD cash to a Bitcoin company who bought it and paid out the seller in USD cash. It was a publicity stunt to prop up Bitcoin and it worked.
"In 2014 I was buying land in Lake Tahoe and I told the sales guy I'll buy this plot if you let me buy in bitcoin because I wanted to promote bitcoin as a transactional infrastructure. That was 2800 coins. That's worth $140-150M today"
- Chamath