Get out while you still can.
IRS and Coinbase: http://www.forbes.com/sites/peterjreilly/2016/12/09/irs-coinbase-summons-what-are-you-going-to-do-when-they-come-for-you/#68363733c3d4
Circle dropped Bitcoin: http://www.coindesk.com/circle-cuts-bitcoin-buying-and-selling-in-blockchain-pivot/
The...