Thanks! I see it now too. Very sharp eye you have. I also cannot explain this sudden drop in amounts of bets placed. Could it be a whale dropping out? Are there any other possible explanations?
This might not be the reason for the sudden decrease in bets, however minimum bet size is limited so smaller bettors will must reduce the number of bets if they are to bet within their means.
Isn't minimum bet already very low? Something around 0.01 btc?
If yes, then is it not more likely that gamblers just reduce the amount of btc they bet, instead of playing less?
Not if they like to feel like they're just playing a game, maybe? Bettors might not miss a few cents here and there, but bets of a dollar each soon stack up.
Also, don't forget that when the exchange rate rockets, lots of people will tend to hoard while they wait for the exchange rate will level. This might reduce not just the amount they spend, but reduce spending events as well.