Design Look:
https://walletbit.com/pos/walletSomething about orange is throwing me off. Green is the color of money. Orange is like a pumpkin. The buttons could be okay but that giant orange bar at the bottom plays tricks on my eyes.
I like it. Green is the color of the money only in some country: in Europe Euro ranges from blu to yellow, and so is for many other countries; and orange is the bitcoin logo color.
This is a fantastic point.
Perhaps a "where are you located" button may be the right way to go so you can "paint" your website colors appropriate to the psychological affects of money based on the geographical location of the merchant.
Not so easy to find one: as I said before Euro is blue for 5 and 20 notes, red for 10, orange for 50, yellow for 200 and violet for 500, so what colour do you pick up? Other currency have the same problem of very wide range of colour too. Maybe is possible to make a css with some choice of colour (green for USA, orange for bitcoin lovers

and so on) but I still think that orange is the bitcoin colour