I don't really see the point of betting on the value of the bitcoin. Then you can even better just keep the bitcoin yourself if you think it will become worth a lot.
To me this type of game is more difficult and challenging to win. While it is exhilarating to find out within 1 min if you were right or not from my point of view a better approach for me would be predicting its direction.
One other thing that surprised me was that I didn't find any info about where the BTC/USDT value is taken from? Making this clear will help people to better extrapolate.