IMO, you've done well to get the top gTLD's. If you purchased them for a quick flip then you're in trouble. But if you purchased them as an investment register them up for five years and develop as time permits. One thing about this business is you can develop and monetize your domains on your own schedule. (as long as reg fee's hold out)
Thanks. I'm looking to hold these domains for the long haul. Despite being a very niche specialty there is major amounts of money changing hands everyday. I'd admittedly sell for xx,xxx despite the huge potential. I think My best option might creating a useful job listing site.