it reminds me of a forex site I tried years ago. I'll see if I can find back the name tomorrow.
It was called
Bitlogic, but the site seized to exist and
BitlogicTrading hasn't been online in years.
I remember you had to predict a higher or lower exchange price, and after about 30 seconds you'd either get 80% more, or lose.
There's only one
screenshot left of it.