We can put reagents and snacks in the shared bank but not TC. I think we should be able to place TC in the bank as well. Perhaps not in the shared bank but at least in the private bank. Perhaps up to 500 TC (so can have a total of 1,000 TC between the bank and the book). When getting TC either from gardening or from battles, if the wizards book gets full, then the cards overflow to the bank. When trading TC with someone, can still only trade what you have on you. That way the bank could be used for stashing TC that you don't plan to use in battles but may want to keep and use for crafting. Which brings on another thing, when crafting, the TC in the bank would be counted.