You could do what I did. Sell every coin you have and wait until the community gets their heads out of their asses then buy them back later, maybe.
it doesn't make sense to sell, in no case you will lose your coins, at best they get more value because out of both chain, BU itself is not going to destroy bitcoin, only moron panic dump will
therefore there is nothing to do for the average joe that want to be safe with his bitcoin, and the exchange were clear about listing BU as an altcoin, this is another point in favor of doing nothing