You can't really know what bitcoin will do in 10 days, if we did know that we would have been richer much more than just gambling, we would have longed or shorted our positions with leverage to make insane amount of profit, but we don't know it at all.
True
Which is why it is also incredibly hard to make a wager on it as well, that is why 3rd most wagered, 5th most wagered type of results end up winning.
Yes, which is why most of the times - its always a mistake that ends up winning. If you go by trend/ calculation , you might most probably lose.