Portfolio and tax managing service CoinTracker parsed anonymized data from cryptocurrency wallets of the top 100 cryptocurrencies by market capitalization to isolate trends of which coins users most commonly held, when ownership would change, and best guesses at why. The data set includes over 40,000 users and finds interesting behavior around tax filing deadlines, blockchain forks, and air drops especially between competing assets (e.g. BTC vs. BCH, ETH vs. EOS, XMR vs. ZEC).