The problem with BTC being used for payment of goods is that it is often both a Fiat source currency as well as fluctuating investment. Imagine paying .012568 btc one day for a cup of coffee, then the next day it's value goes up 10%. Now I lose that value (what? I just paid $10 for a cup?) Or goes down (OMG if I sold that cup of coffee (read, sold a domain name)I just lost money (cash value). When BTC was $100 I thought it was too expensive & decided to wait. A month later it had skyrocketed to over $1000. Was I a dummy for not acting fast? Yes. But imagine how pissed off I would have been if I bought a $10 domain when bitcoin was at its $100 price? It would have turned out I'd just paid $100 for for a $10 domain. THAT is why DD does not take BTC.