Lottery "Mini games"

I was thinking of a sort of "1v1" style of a lottery, for example a player will put 500 points up and another player will see he put 500 so he will match it. After matching the points they could do a a coin flip styled system where winner takes all just like from csgo lotto.
https://csgolotto.com/duel-arena

 

I could see this causing conflict between players, among other things. I wouldn't go for this one.

 

Neutral as this will cause arguements if a player gambles lets say 100k (Probably won't happen) he loses then he might go revenge rdm the person he lost to.