In June this year, the USA began to indirectly regulate most banks around the world.

"FATCA imposes a 30% withholding tax on payments of US source income made to non-US financial institutions unless they enter into an agreement with the US Internal Revenue Service (IRS) and disclose information about their US account holders."

The UK began putting in place regulations in 2013:

http://www.legislation.gov.uk/uksi/2013/1962/contents/made


American's are taxed by the IRS on their worldwide income, even if they don't live in the US.  Many try to hide their non-US income from the IRS by putting money in foreign banks that have secretive services, for example Swiss numbered accounts.  These types of rules have already seen banks fail.

http://www.thelocal.ch/20131019/swiss-bank-closes-after-us-tax-probe

I am very, very concerned that American's will turn to Bitcoin and then eventually to Darkcoin to try and hide their worldwide income.