To share with others.
“And God will generously provide all you need. Then you will always have everything you need and plenty left over to share with others.” 2 Corinthians 9:8 (NLT)
The real reason why God Blesses you is for you to be able to share with others
Abraham and other Patriarchs  increased in Blessings and Riches because they shared with others 
Whatsoever God’s Grace has bought your way, remember it’s to be shared.
“God can pour on the blessings in astonishing ways so that you’re ready for anything and everything, more than just ready to do what needs to be done. As one psalmist puts it, He throws caution to the winds,  giving to the needy in reckless abandon. His right-living, right-giving ways  never run out, never wear out. This most generous God who gives seed to the farmer that becomes bread for your meals is more than extravagant with you. He gives you something you can then give away, which grows into full-formed lives, robust in God, wealthy in every way, so that you can be generous in every way, producing with us great praise to God.” 2 Corinthians 9:8-11 (MSG)
Grace is “God’s Riches At Christ’s Expense”
He has given you Wealth and Riches, share with others
He has extended His Love and Forgiveness to you, Love, and forgive others.
He has saved you; share your Salvation and Faith with others too.