according to blockchain.info charts, every day about 170 Million dollar to 350 million dollar is being moved around with bitcoin. the average of this amount is something around
200,000,000 USD per day.
this is about 200,000 to 350,000 bitcoins daily.
https://blockchain.info/charts/estimated-transaction-volume-usd (the past year)*

* This is only showing the total USD value of bitcoins that were transferred from one address to another in one day excluding change (coins returned to sender).
This is one of the factors that cause the price of the bitcoin continues to skyrocket, I bet the price of the bitcoin can reach $2.000 so that I hold all bitcoin which I have.