look it´s easy.
With a binary broker, you make bets and you invest a sum of money for each bet. Let´s say $100 for (for example) EURUSD will go up in the next hour (or day or week or whatever). At the end of the hour, you will win or lose.
If you lose, you lose 100% of the money you set, so $100
If you win... you get only 80% of what you set, so $ 80! The rest goes as comission to the broker.
If you go to a casino and play roulette, for example only red and black, you can lose 100% or win 100%.
So roulette is even better than binary options! 😁
The differenece between who your are and who you would like to be be is what you do