The data these statements are based on seem dubious? Or is that just me?

> if you bought in 2014, we would know that [someone] bought at 5pm CDT

But if I bought BTC on an exchange, e.g. Coinbase, then that purchase would not necessarily be recorded on the blockchain, right? Just CB internally updating a value in their DB. All BTC buying and trading would be a larger superset of the collected data.

Also if I transfer 1 BTC from one of my wallets to another, then that counts as a buy/sell transaction for this dataset!