Honestly, I feel like any form of gambling is not really worth it. What if you end up tossing in something like 5$ in bitcoin into some form of gambling. What if bitcoin multiplies ten-fold in the next few years? That's a loss of 50$, assuming you don't win (which is the most probable outcome). I guess people get the rush of gambling when they buy into whatever form they prefer, but in the end, you're more likely to come out negative.