Even God used wisdom to found the earth. Wisdom set the world in order and founds it. It will do the same for our lives. Wisdom provides one length of days, similar to the eternal life which the tree of life provided for mankind. We will find that the wisdom of God, which the writer of Proverbs is referring to, actually brings us back to the state of life which Adam experienced before the fall while he yet dwelt in the garden of Eden.
Wisdom is said to be riches.
The fruit of the Tree of Life in Eden was actually the very means by which man would receive eternal life. The wisdom of God provides that very eternal life, for the writer of Proverbs says that length of days is in the hand of wisdom. Picture this as a tree with her fruit. Like the fruit at the tips of the Tree of Life's branches offering eternal life to humanity, wisdom extends its hand, holding length of days for man to partake of. The fruit on the Tree of Life correspond to the length of days in the HAND of Wisdom.