1. Most likely it can.
2. You can make as many as you like with the same image, so long as you have sufficient CPs to spawn it. The 10 limit was just to make it easier for those that want to spawn multiple copies without having to labouriously enter in the information for them each time.
We have not seen custom currency yet, but it is of course possible. Expensive CPwise, but possible. ANd they are also correct when they say that people can counterfeit it if they have the images. We have no power to stop them.