I think travelling could be a good idea. Asia is very affordable for long stints. We have an open couch for other entrepreneurs and you are welcome here in HK for a couple weeks if you need. Well done asking for help. I think you would get even more if you used your account next time. People understand. Because we've been there. :)
Consider to take a break for 2 weeks, rather than resigning, replacing yourself or talking to your wife. After 2 weeks you may feel less burnt out and see things more clearly. You can get medication (and I for one can confirm it does work) but ideally that's to get you out of the rut not a permanent solution. It's possible that your lack of passion for this idea, combined with how much time and dedication it takes is making you feel this way. Your mind/body doesn't understand the inherent contradiction. I'm married to my cofounder and it's hard to be honest when one is feeling weak, but hiding stuff damages your intimacy and closeness. Protect that, it's worth more than your company.
Hi. You seem nice. I'm nomadic but don't have a problem making friends that feel like siblings. I think this has to do with the fact that I try to be completely open about who I am and my many short comings from the start. For whatever reason you are more likely to get the same response. Maybe you are a very open person and this is an unhelpful suggestion. But I'll make it anyway, because you seem nice:)
I think Fintech is interesting from a P2P perspective. When regulation gets involved it gets hard so starting a sharing platform and moving it towards a bank seems a more likely.
Try Warby Parker. They have issues delivering (allow a month) but the product is good. My husband bought sunglasses with diff prescriptions in both eyes and they work great, no smudge issues.
It also seems like investors are more concerned about reputation than founders.