You're right about that, market always changes so we must always change too, keeping one trading/investing methods for all time can cause loss. So, what we need to do at all time is learning and researching, always keep tracking the market. A method works today not mean that it will work tomorrow.
the market is not always in good condition and often changes so we have to adjust to market conditions.
Take advantage of your time because it's not always good to do it.
good and right strategies can help your business, so think about a good strategy and understand the market.