This isn't the most accurate thing, but looks to me like several millions USD worth of volume just in Bitpay. That doesn't account for all of the other payment processors, or the peer to peer payments, or the exchange trading, etc. I'm not saying dark markets aren't an early driver of Bitcoin, but it's not where the majority of the action is now at all.
"peer to peer" payments don't require a blockchain: see Venmo, Square Cash, Facebook Messenger, PayPal, TransferWise, Uber (paying the driver), etc.
Exchange trading is not really using bitcoin, it is buying/selling bitcoin. This is like saying buying a car is an application of cars...
Having said that, Bitpay is processing more than I thought. The data in that article would mean it's about $5M per day... I'd love to see a breakdown of this to figure out why people are spending bitcoin for everyday things if it'd be better for them to just use a credit card (to get rewards, to not have to hold a volatile currency, for consumer protection, for faster payments, etc.)
If you buy stuff via bitpay with your hugely appreciated bitcoin you probably have a good shot of successfully evading the taxman. I bet that's what a lot of that traffic is.
That and you can buy cash-like goods like gold bars which would be prohibitively expensive or impossible to purchase via credit card.
Well, that's a narrow definition of P2P. All of those are centrally cleared systems vs a decentralized one. Buying a car is an application of money. The killer app for Bitcoin is better money, that's the vision I subscribe to and the one I would like to see proliferate.
This isn't the most accurate thing, but looks to me like several millions USD worth of volume just in Bitpay. That doesn't account for all of the other payment processors, or the peer to peer payments, or the exchange trading, etc. I'm not saying dark markets aren't an early driver of Bitcoin, but it's not where the majority of the action is now at all.