God's heart is never for you to die young, nor for you to live a long, but miserable life.
In Ps 91:16, He promises you that with long life He will satisfy you, and show you His salvation. This means that God promises you not just long life, but also a satisfying one full of His goodness, wholeness and peace!
In the verse, the word “salvation” is the Hebrew word Yeshua, the name of Jesus. God will satisfy you with a long life that is full of Jesus! Expect a long, full life where you walk in all the blessings that you have in Christ—health, wholeness, provision and contentment!