How do citizens vote with their money against Wall Street and Big Banks?

You can’t keep your money in a mattress —or not enough people would do that to make a difference.

Technically, with automatic deposit and internet banking, it is possible to bank anywhere in the world —a non US bank, but aren’t most banks internationally connected anyway?

Meaning, when consumers are upset with a corporation, they boycot it’s products.

How do you boycott Wall Street? How do you hit them in the wallet?