Am I wasting my time seeing if I can find a web developer who:
1) Is willing to invest time into a potentially risky project and get paid a percentage of profit instead of an upfront price
2) Knows at least a little bit about working with bitcoin from a web application
3) Can somehow guarantee they won't just take the idea if they think it's profitable
Honestly I wouldn't be surprised if this is really unreasonable, but I might as well ask.
It is. Why would anyone go for a percentage of a low profit anyway when he can earn a good hourly rate?
You need a fun project so that people put in their spare time because they want - for a hobby project. But for a project that is profit oriented, sorry, there is this thing called "market rate". Profit share? Sure. Distribute 90% to the people making the work, as shares (ownership) and make sure it is 4-5 tims market rate later (i.e. a good project) and you can talk to good people