Steal him away from GSW? sure.
"steal" him by offering 12M/year or more? nope.
Patiente is key, and these Warriors are a great team because of many reasons, not because of Draymond Green. He's a good player, but overpaying for good players is not the way to build a contender.
Celtics are developing, we're not one piece or two away from contending, maybe in a couple years, but not this summer, IMO.
Draft well, extend/resign the guys who are keepers, and wait for the right move.