It's unlikely that he did it in a single transaction, he more likely split it up...

_kjkw on July 9, 2017 | parent | context | favorite | on: Meet the Man Traveling the World on $25M of Bitcoi...

It's unlikely that he did it in a single transaction, he more likely split it up over a few days. Even a year ago, Bitcoin daily exchange volume was ~$160M, so he wouldn't have had too many problems.