By Libby George LONDON (Reuters) -Artificial Intelligence is not a core part of operations at most of the world's central banks and digital assets are off the ​table, according to a survey released on Wednesday by the Official Monetary and Financial ‌Institutions Forum. The working group of 10 central banks from Europe, Africa, Latin America and Asia managing roughly $6.5 trillion ‌in assets also found that the institutions that have delved deepest so far into AI are the most cautious about the risks. T ...