Actually, after I get all the items in the area, I still drag a wormhole for slightly longer. This is not for show -- Dragging stuff around allows me to reach speeds up to 4 pixels per (non-lag) frame, where the usual maximum is only 3. I keep this speed as long as I do not make a thrust that would otherwise add speed to the same axis.
Because of this unforeseen speed boost, I'm a lot more confident that dragging wormholes is worth the crystal spins necessary to get this fancy jetpod.
Also, I'm used to thrusters that barely push me around, and sorely lacking when it comes to tethering items around. Having something this strong is taking some time to get used to it.