I used the log scale to make the point that transaction volume is relatively slow-moving on a log scale. That is certainly not the case for the exchange rate!:
Incidentally, the volume graph has a notable spike in December 2011. I've Googled and asked around a bit, but don't have a good understanding of what caused the spike.
Since this is just volume measured by number of bitcoins exchanged, wouldn't it be more accurate to scale it by the exchange rate of your primary currency (ie. the product of the two graphs)? That seems like it would more closely represent the value being exchanged.
This seems to support the conclusion that transaction volume (in USD) is growing significantly, although the trend is confounded by large price movements.
https://blockchain.info/charts/estimated-transaction-volume?...
I used the log scale to make the point that transaction volume is relatively slow-moving on a log scale. That is certainly not the case for the exchange rate!:
https://blockchain.info/charts/market-price?showDataPoints=f...
Incidentally, the volume graph has a notable spike in December 2011. I've Googled and asked around a bit, but don't have a good understanding of what caused the spike.