The problem with finding the origin is two things.
1. It's not exactly "profitable". It's a long shot at best, and all that time spent could be put to better use.
2. The way to find the origin is all based on guessing. Educated and intelligent, but guessing all the same. Unless you have a way to travel or look back in time, it's theory after theory after theory.
The good things are minimal but helpful.
1. In the extreme off chance origin finding is successful, the technology used might be helpful for other stuff.
2. Maybe the origin contains some sort of technology that hasn't been discovered, highly unlikely.
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For those saying "we have to know our origin" shut the fuck up. You don't know your goddamn geneology right now, who the fuck cares where humanity came from.