I (Thibaud) have been earning 100% in bitcoin for almost 2 years now. That comes with a few challenges. Being a freelancer in bitcoin is awesome. That being said, finding various companies offering regular part-time gigs is hard. Invoicing clients can be time-consuming as you often bill in USD and get paid in BTC. On the flip side, if you are a bitcoin business looking for part-time talent, it's the jungle out there. Check out Upwork... lots of "crypto or blockchain" devs but bitcoin is nowhere to be seen. We experienced these two realizations and thought that we could improve on that. Also it would be awesome to allow more people to work on bitcoin part-time but who are not ready or willing to commit to it full yet as of yet.