Don't forget
this one; a 1,000 BTC bet in March 2014 when BTC was around $650 ($650k) is close in dollar value to the 7,016 BTC bet on Just-Dice when BTC was $137 ($961k).
If you're looking for the biggest number of BTC ever bet, Vandroiy
once bet pirateat40 5,000 BTC that his BS&T was a Ponzi -
and won. But BTC was only around $5 at the time, so it was "only" a $25k bet.
Yep it should be taken into account the fact that since BTC price fluctuates a lot, in the early days someone could have made a bet of 1 million Bitcoins and it wouldn't be impressive since back then Bitcoin was pretty much a cent of a cent of a dollar. What I would like to know is the smallest bet with the biggest return but that's for another thread, in fact I will make one asking this right now.