No. In fact, they are two separate things. Highly volatile slots are a type of game where wins are not acquired regularly, but when a win does occur, it tends to be of considerable value. By contrast, high rollers are players who like to wager large sums, either in quick succession over several spins. Because of the size of their balance and deposits, it is true that high rollers will be able to sustain themselves during the long periods without wins in highly volatile slots until that big win comes along. However, highly volatile slots can be played by all players, and high rollers are welcome to play low variance games, too.