If true I think we're looking at the biggest heist in history.

Current largest was ~1B

1MDB heist was $4.5bn so this would indeed be bigger.

that one was over (years?) time, wouldn't call that a heist really

fraud, not a heist

Bybit was hacked for $1.5B last year.

https://en.wikipedia.org/wiki/Bybit

Guess they said by(e) to their bit(coin)