Bitcoin is still mostly an underground thing that has not reached mainstream adoption. It is currently facing a tough time with regulation, for the coming months I dont think it will impact credit-card companies much.
Thanks Muwa for the reply - I agree with you that it is tiny and will be tiny for awhile, but what it does do is make you stop and look at what is the valuation of the industry and it is gargantuan. Once you reflect on how large the industry is as a percentage of the economy and the market cap, then we can all re-value the industry. The super-Highway system bankrupted the Railroads. The telcos were bankrupted by the internet. The next wave of technology can destroy or disrupt the current system of money-transfer-fees. Either way, I'm just trying to say that I don't think bitcoin is mainstream either, but that it is a small threat in the long run.