It takes very little time to buy, I have to remove my time bomb to save it anyway, and carrying that wormhole around for the boosted speed appears very useful.
It beat my older time by a fairly decent margin, too. Reported Down+A at 41326 -- Old time at 42147, 821 frame saved!
Since that made pretty heavy use of the special jetpod for dragging wormholes, I have no doubt it's worth spinning the crystal. Hope to beat this game soon!
... It's tricky dealing with things to swing. I'm never really sure if I am keeping things as tight as possible.