This is sign that bitcoin is going mainstream and we would need to invest more as I am planning to open an exchange business in my country.  I have also meet an artist to design this kind of big  signboard for me. We should put bitcoin sign on every business we do.  I was in a meeting last week to have discussion with owner of a boutique's management and I recommend for them to put bitcoin sign on they doors as way to outsmart they competitors. Time is coming when most of the online store are going to accept bitcoin as a means of payment.