Nowadays banks have not remained just banks and they have started dealing in other assets like gold and others.
Rightly said. And, in fact, they have been doing much more than we ever expected of them, like selling gold, mutual funds and even application forms of various educational institutions. Banks are allowed to sell mutual funds and also other financial products and third party products as well.
However, it must be kept in mind that banks are heavily regulated. Everything that they do must have the approval of the Reserve Bank of India (RBI), which does ensure investor safety to an extent.