The only evidence Hillman provided was a redacted conversation via LinkedIn, where he denies meeting with someone, and they reply: "they impersonated your hologram. This person sent me a zoom link then your hologram was in the zoom". (Again, hologram?) Amusingly, Hillman waxes poetic about the importance of security at Binance throughout the whole post, while also including a LinkedIn screenshot with a name that's blurred so poorly it remains completely legible.
Hillman goes on to claim, with no further evidence, that "a sophisticated hacking team used previous news interviews and TV appearances over the years to create a 'deep fake' of me". If so, this would be remarkable, as to date video deepfakes have mostly been limited to robotic-sounding and grainy pre-recorded Elon Musk impersonations, rather than anything that can respond naturally and quickly to alive conversation.
Another possible explanation is that Hillman is trying to cover Binance's collective ass after being caught taking listing fees for tokens they never list. But who's to say, really—maybe deepfakers have made a considerable breakthrough with startling implications, and Hillman just didn't feel it was important to elaborate on.