This is an easy question to answer. Growth in BTC retail acceptance is a great incentive for BTC price drop. People are not buying bitcoin to spend them immediately, all those spent BTC are from longer term holders. It's obvious what retailers do with BTC they acquire: they drop them on the exchanges that same moment through BitPay or other payment processors. I believe this is one of the main reasons for current drive towards lower BTC price.
I agree but I argue this is a short term effect and since retail has been going on for a while a some of that is already played out.
I don't agree that the goal is people buying BTC in order to spend them. That would be just neutral (since the retailers would generally just sell). The goal is for more people to recognize the coins as valuable and accept them as such. This requires there be useful ways to spend them, which is why retail is contributing to the growth of bitcoin despite the inevitable short term price pressure.
But this is somewhat off topic for the
Altcoin observer thread so perhaps we should conclude this discussion soon.