Why are UK banks blocking crypto?

I've been hearing a lot lately about UK banks blocking crypto transactions. As a finance professional, I'm curious to understand the reasons behind this decision. Could it be due to concerns over security risks or the volatile nature of cryptocurrencies? Or is it simply a matter of banks not wanting to be associated with a sector that's still relatively unregulated? I understand that banks have a responsibility to protect their customers and ensure the stability of their financial systems. But at the same time, cryptocurrencies are becoming increasingly popular and are being adopted by many businesses and individuals. Don't UK banks see the potential benefits of embracing this new technology, such as faster transactions and lower costs? I'd like to hear your thoughts on this topic. Do you think UK banks should reconsider their stance on cryptocurrencies? Or do you agree with their decision and see valid reasons for blocking these transactions?