For me personally the lesson is to always have stable assets and always withdraw assets from a centralized exchange to a cold wallet if you don't want to trade. Then it's wise to use a centralized exchange only when you want to buy and after that you don't want to sell then the solution is to withdraw everything. Don't let your assets stay there any longer. If you are a trader or investor, always pay attention to issues that have the potential to destroy prices so that you are quickly alert in securing assets.