If you are familiar with secondstrade it's a the same game and type of gambling. If you are good in predicting prices then go for it but if you aren't better not. But it's not that bad to try it, I've that before but it's quite hard to predict what will be the price of bitcoin for the next minutes.
What OP is saying is that someone can control the bitcoin prices if they have a lot of it, which is easy with just a few hundred bitcoins. The bet is "influence-able", forgive me for the lack of a better term to use. Unlike a dice game where you can don't have any way of changing the outcome no matter what you do.
Yes I do know about it and he said
I really don't understand this. They are letting you bet on what the price of bitcoin will be in 5 minutes. How is this fair at all? Could a whale not bet and then buy/sell to take everyones money?
That he don't understand it and for just 5 minutes the same thing with ST. And with the manipulation it really depends on the whale if they are into this type of game.