All my 750+ coins are in one collection and I am thinking of creating another but it is only viable, in my view, if a bulk move is possible...does such a feature exist? I have had a brief review of functionality and of the forum posts but have not uncovered anything.
Since you only have one collection with coins in it, no bulk move is possible. You can move all your coins from one collection to another by making the new collection the default and deleting the old collection but in your case that doesn't help.
But under 1000 coins is also not that much. What should people with tens of thousands of coins say? Do it in chunks over the course of a couple of days.