And he answered him, ‘Sir, let it alone this year also, until I dig around it and put on manure. Then if it should bear fruit next year, well and good; but if not, you can cut it down.’
Luke 13:8-9

Just because God hasn't cut you down yet, doesn't mean he won't do it in the future. Consider your continued life to be evidence of God's enduring grace, another opportunity to repent from sin and cultivate the fruit of a righteous life.