Throughout 2015, Bitcoin exchanges, mining, and trading firms in Australia received letters from their bankers. The message was the same; the commercial banks were withdrawing their services. The banks gave little explanation for the move, but these termination of service notices set a dangerous precedent that other countries could follow.
“Our members have been unable to obtain any formal clarification on the reasons for closure, except for references to policy or risk. Just what policies or risks these are have not been specified,” Ron Tucker, ex-chairman of industry body The Australian Digital Currency Commerce Association, complained back in September.
http://venturebeat.com/2016/03/18/fear-or-greed-why-are-australian-banks-cutting-off-bitcoin-businesses/