As an international tax lawyer who has handled many, many cases for clients with money hidden in secret accounts offshore, I have two pieces of advice.<p>1. For Coinbase, this will not end well. The best Coinbase can hope for is a pretense (for marketing purposes) of Standing Up to The Man. Then a total data dump to the Department of Justice or go out of business.<p>2. For Bitcoin users, don't cheat on your taxes. (Oblig.) If you are concerned about information leakage to the U.S. government, do business with a company that has no ties to the USA.<p>It's not hard to see trendlines if you have watched for a while. Remember G.K. Chesterton's fence.