This article doesn't mention bitcoin, but it does emphasize a huge market opportunity there:
Large financial institutions like Bank of America (NYSE:BAC), HSBC (NYSE:HSBC), Citigroup (NYSE:C), and JPMorgan Chase (NYSE:JPM) have dealt an expensive blow to immigrants and their families. As regulators crack down on money laundering and illicit international transfers of wealth, the world’s largest money movers have scaled back their cash transfer businesses. Most affected has been Mexico, as about half of the total remittances sent from the U.S. go there.
So why did banks decide to pull the plug on this business, which The New York Times calls the “the largest and arguably most effective antipoverty effort in the world”?
For banks, it is regulatory paranoia, among other reasons.
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http://wallstcheatsheet.com/business/why-are-banks-refusing-to-transfer-your-money-abroad.html/2/