I am not sure if this is such a good idea to be honest. Using the amount of Bitcoin transactions processed daily to gauge the adoption rate might be misleading because it's very easy to spam the Blockchain with fake TX. How can we distinguish between the real TX and the bot spammed fake TX? Increasing the amount of daily TX doesn't always translate to more unique users
Fake transactions usually don't have fees set, right? If so, they can be easily found and discarded. On the other hand, if they have fees, then are they really fake?
Wouldn't that plateau as we reach the blocksize limit? Bitcoin adoption could be increasing, with more transactions moving off-chain.
But we wouldn't able to figure that out, by justing looking at the number of transactions being processed.
There are still many half empty (or half full) blocks on the blockchain, or blocks with only the block generating transaction (don't know how it is properly called). When we get to the point at which there would be no more room for transactions in all blocks at the current block size during, say, a day, the block should be already expanded to accommodate all these new transactions...
It would be interesting to know the average percentage at which blocks are filled right now