when I see this title I always look at the banks in my country and the first thing that comes to my mind: "no, no, no... the banks in my country do not buy bitcoin" and the reason is very simple, the banks in my country for example they want almost safe profits, something they say: "in a few years we will have 3X profit" so they will prefer to continue giving loans to people in my country and charge high interest and after 5 years they will have high profits than buy bitcoin that will not have a 100% guarantee that after 5 years they will have a profit of 3X, I gave an example of the banks in my country, but probably the banks in other corners of the world are worse than the banks in my country
Let's not get overexcited especially with the many bad things happening in the cryptocurrency industry. I am sure that there can be some banks - maybe under a subsidiary they partly or fully control - that are owning Bitcoin but I am not sure any bank that is planning now to be getting into Bitcoin. Banks can have a hard time managing the risks with extreme volatility...they prefer something that is stable and sure. Now, I always prefer that it would be the people that will be the leading investing force for Bitcoin though sad to say that retail investors can easily be swayed by FUDs so they can panic easily.
That's the answer, Banks really don't risk in a volatile market with money from people's reserves. They might be in bitcoin or crypto with some of their assets but not that big enough to move the market or do anything to manipulate it.
banks are constantly monitored by central banks and the central bank is very strict in complying with laws, banks will not risk losing their license, paying high amounts in fines and even being arrested for taking money from customers to buy bitcoin, they will not that. things in the real world work that way, there are laws and people can easily be arrested if they commit this type of crime of taking money from customers and buying bitcoin when the central bank does not allow them to do that. I don't know how some people can still be fooled into thinking that banks will buy a lot of bitcoins