>>105882339
Always complete it, especially if you're most of the way through.
If nothing else it tells the next guys that you can complete a degree (I've seen some apprenticeships list unrelated diplomas/degrees under "nice to have").
That said, if you can get a solid apprenticeship if you're only half way through then it might be worth swapping. I can't speak for America though, spics have probably mostly ruined the viability of trades over there.