It makes it so more people will be interested in bitcoin. It is a sign that bitcoin is common enough that many people will understand when it if referenced in 'pop culture'
By affirming to the ignorant suspicion that bitcoin is an anonymous payment system used by the underworld to circumvent detection?
For all intensive purposes, using bitcoin is anon. This is especially true for smaller transactions.
Unfortunately bitcoin is used by criminals to hide their identity (although there are many other uses for it as well)