Posts per day and new authors can be retrieved from each subreddit programmatically; each post is timestamped, so historical time series can be generated by iterating through the posts. Posts per day are used here rather than comments per day. Each post on Reddit can have a number of associated comments in a one-to-many type relationship. However, examples exist where huge numbers of comments are generated that are unrelated to market activity; for example, sometimes people give away small amounts of cryptocurrency to everyone who comments with their public blockchain wallet address; this causes a huge spike in comments (wavelet coherence between comments per day and price were also generated, but as was expected showed less significant relationships than posts per day and price).
The White House signaled that the US will gather 30 other countries to discuss responses to cybercrime.

The Fibonacci retracement indicator, measured from the Oct. 17 swing low at $3,640 to the Oct. 21 swing high at $4,375, suggests that Ethereum is sitting on stable support. The combination of the 50% Fibonacci retracement level with the 50 four-hour moving average at $3,922 is the most significant interest area underneath ETH.
Given the pace of crypto adoption, there are a number of ways to buy cryptocurrency. Crypto-native exchanges offer a plethora of different digital assets for buying and selling. In the mainstream world, PayPal serves as one example platform on which participants can buy and sell certain digital assets. Crypto ATMs such as Bitcoin ATMs also exist in various parts of the world.