In my opinion bitcoin don't need any advertising
+1
just like the dollar or the pound doesnt need advertising. but services ontop of FIAT would advertise as they are a business / service a layer above FIAT. EG western union, visa, mastercard.
this is where businesses a layer above bitcoin, such as: bitpay, bitstamp, localbitcoins, etc would pay to get their business advertised and entice people into the bitcoin ecosphere