Didn't the Citizens United vs. FEC case argue that money is free speech, and therefore campaign finance laws limiting Super PAC's spending were overturned?

How might that affect banking laws that require banks to flag suspicious transactions and restrict who can send and receive funds? Have the banking laws that restrict payments ever been challenged in court as a free speech issue?

Just wondering if these two dots are in any way connected. I am not pro-money laundering but also don't like the idea of government overreach. Thinking that since banks are non-government that the constitutional protections don't apply, but what about the laws that bring about the banking regulations?