This sounds like some kind of fraud...
Fraud an intentional deception made for personal gain or to damage another individual.
I don't see this as necessarily being fraud.
There may be laws broken if someone actually were to provide the service being requested here, but I don't think fraud would be among the charges.
That being said, providing this service would not be a smart thing to do. If someone else has possession of a card in your name and makes charges with it, you could be liable up to $50. Thus accepting $55 worth of bitcoins, and taking on a potential liability of $50 alone makes this a bad deal.
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http://www.ftc.gov/bcp/edu/pubs/consumer/credit/cre04.shtm