Looking at the charts in blockchain.info:
* The number of transactions per day has increased only 50% in 12 months, and has remained practically constant (with some fluctuations) since November.
https://blockchain.info/charts/n-transactionshttps://blockchain.info/charts/n-transactions-excluding-popular* The number of new unique addresses per day has increased 200% in the last 12 months, but it too has remained pretty much constant over the last 4-5 months:
https://blockchain.info/charts/n-unique-addressesNote that there are 150'000 new addresses created per day, but only 60'000 transactions per day.
* The total trasaction output volume in BTC per day has decreased slightly over the last 12 months, and has remained fairly constant at 600'000 BTC/day constant since January:
https://blockchain.info/charts/output-volume* The same holds for the "estimated real" transaction ouput volume in BTC per day (excluding the outputs guessed to be "return change"), which is now around 80'000 BTC/day
https://blockchain.info/charts/estimated-transaction-volume* The "estimated real" transaction ouput volume in USD per day (computed from the previous value and the USD/BTC market price of the day) varies more than the BTC volume, and tends to follow the USD/BTC price; in particular, it fell more than 50% from January to May, then recovered and is now at 50'000'000 USD/day.
If most of the "estimated real" output volume was due to coins being transferred from person A to person B in echange for goods, services, or national currencies, one would expect the volume in USD/day to vary gradually with time (hopefully increasing) and the BTC/day to vary inversely with the price. What we see is more like the opposite: the BTC/day is steady and the USD/day varies with the price.
This observation suggests that most of the 80'000 BTC/day "estimated real" output volume is "fake", namely BTC being moved between addresses owned by the same person. That may include traffic through tumblers, hot/cold wallet transfers, stress-testing of bitcoin software, etc.. Note that a single user could generate 600'000 BTC/day of total output volume by moving ~4200 BTC every 10 minutes between addresses of his own.
My conclusion is that those blockchain statistics are basically useless for estimating bitcoin adoption. Much more useful would be the volume processed by BitPay and other bitcoin-to-dollar processors. Unfortunately, that number is conspicuous for its absence in the CoinDesk report.