I remembered I saw somewhere before that monitoring the increase in the number of bitcoin wallets is not a good metric to measure the rate of bitcoin adoption. But I cannot remember why that is so. Does anyone know?
Well in general monitor addresses isn't that useful as the more people are educated about not reusing addresses and they start using change addresses it doesn't really tell you much.
As far as wallets go, a single person can create 10 wallets on blockchain.info, the metric goes up but really there doesn't have to be any new interest for that metric to go up.
I personally think number of transactions (excluding popular addresses such as satoshi dice or pool payouts) is a better metric
https://blockchain.info/charts/n-transactions-excluding-popular?timespan=2year&showDataPoints=false&daysAverageString=7&show_header=true&scale=0&address=Speaking of number of transactions....have you noticed that each "bitcoin boom" (as I like to call them) starts when the number of transactions reaches the previous bubble's?