Nancy spoke against the idea that was floating around not long ago of putting Reagan on the dime, saying that Roosevelt had been on it for so long and should remain. She may well feel the same about other coins or currency. If his family doesn't like the idea, then out of respect I would oppose it, too.
Ronald Reagan belongs to the ages, now, and not just to his family. Reagan belongs on the dime, and on Rushmore, IMHO. Keep Hamilton on the sawbuck.