Strive for righteousness and piety in life; Do good deeds; Remember Allah SWT; Use time wisely; Turn your life around if needed.

This hadith is about how the righteous people will eventually pass away from this world one after another, leaving behind only those who are useless. It is a warning to all believers to strive for righteousness and piety in their lives so that they can be among those who are remembered fondly when they depart from this world. The Prophet Muhammad ﷺ was reminding us that our time here is limited and we should make sure to use it wisely by doing good deeds and avoiding bad ones. He also wanted us to remember that even though some may seem useless now, they could still turn their lives around if they choose to do so.