Using vast amounts of computing power, often manifested in private server farms owned by mining collectives that comprise dozens of individuals, miners use highly technical methods to verify the completeness, accuracy, and security of currencies’ blockchains.
On Oct. 21, Binance.US suddenly printed a one-minute candle that took BTC/USD from $65,815 to $8,200 — a drop of 87%.

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).
Income tax: Profits and losses from cryptocurrency transactions must be shown in a non-incorporated business’s accounts and are taxable/allowable under conventional income tax laws.