Site looks great and I agree with @amacar2 that .tk domain should not be used for a site dealing with money (in our case, Bitcoin).
.tk domain really bro .tk for games marketplace nobody gonna trust your site bro. I will suggest you to atleast buy one .com or .net premium domain.
However your site design look nice don't know you made it custom or it is some marketplace script but its simple and nice. Good luck
To add on. Namecheap, a domain registrar which accept Bitcoin is having 88 cents promotion on new top-level-domain extension. I'd suggest you to buy a .xyz domain for your site. Well ... it is just 88 cents and you could make you site look more professional.
