How long does (insert yo-yo name) sleep?
As long as you can make it. Really. I mean certain yo-yos sleep longer comparatively to other yo-yos but skill is the determining factor. Some yo-yos are known for their long sleeps (Cold Fusion, Samurai, Mega SpinFaktor), but a truly skilled thrower with a Turbo Bumble Bee I’m sure could out sleep me with a Cold Fusion. And as long as you can make it sleep long enough to do a trick, what else matters?