it seems impossible but sometimes i can't help but wonder if there really exist some people who are earning consistently from gambling that makes everybody consider gambling as a method to grow your bitcoins.
There are, but that is only possible for games where you somehow can gain an advantage against losing. For example poker. If you know how to do it you can earn pretty constantly. Or card counting with blackjack. Though you will have the problem that casinos will blacklist you and you will not be able to proceed.
Sports betting might be possible too.
But dice sites ARE DEFINITELY IMPOSSIBLE TO MAKE A CONSTANT PROFIT. There is NO way to gain an advantage. So everyone telling you he can... with some method or something
is either lying or delusional living in his own world.