I'm no expert on cryptocurrencies and the like, but one thing I have noticed is that you'll normally find that people who are really into Bitcoins and the like, will go out of their way to find places that accept Bitcoins. They're devoted to making the currency work and are loyal to those that use Bitcoin. If you accept Bitcoin they want you to succeed so that other people will start to accept Bitcoin.
So if you had a 'we accept bitcoins' sticker in your shop window, even if you're a little bit more expensive, or a little bit further away than a similar shop... they'd still go to yours over the other one.
That's just what I'm observing and have heard, based on my own experiences... there's a few generalisations in there, so I could be wrong!