He bought it on 2017-10-27, binance was launched on 2017-07-14 (and for example binance.com was registered on 2017-04-01). I think it's fairly reasonable to as

He bought it on 2017-10-27, binance was launched on 2017-07-14 (and for example binance.com was registered on 2017-04-01). I think it's fairly reasonable to assume that he bought it because of the binance launch considering the timeline, his interest in crypto and that the term binance has basically 0 mentions on for example google trends before 2017.