The project is very interesting and if you truly prosper in realizing your visions, then I think it will be nice.
 

Listing on top exchanges is expensive
I think for this project is too early to spend a significant amount to go to the top exchanges.

is trust ? Can anybody help me out on this project?

Can you help me ?
captchas" => (json of array) - array composed of grecaptcha.getResponse()
I do not understand this