1.Don't start counting your eggs before they're hatched.
2.An idea,blueprint works out good,once it hits the real market you would know where you stand.
3.Marketing.If you don't have money from marketing a bitcoin app in 2017,your app isn't going anywhere.
4.Since you already have a good team set-up and all,why don't you look for actual angel investors ? Maybe go to Shark Tank.