I'm not all that worried because I don't think he's going to get offered anywhere near the money you guys are talking about... however, tossing around 15-20 mil, 4 year contracts to relatively mediocre players because they had some money to toss around is how the Wizards and Blazers got in their untenable cap situations, forcing them to dump young players down the road.
It wasn't only the Blazers and Wizards that screwed themselves. Both of those teams matched ridiculous contracts for their players that were offered by the Nets. The Nets signed Otto Porter, Allen Crabbe, and Tyler Johnson to ridiculous contracts over the years that their teams have matched. There are more than just those players and teams but I think we can be thankful that the Nets shouldn't have much cap space this summer. The Nets also own their own picks going forward so I don't think they will be that desperate to add young talent. They seemed to screw the cap space of a few teams by the deals they've been throwing around.
With all of the free agents this summer that won't be restricted free agents, I don't think we'll see Oubre or any other restricted free agents offered ridiculous offer sheets. We'll see what happens but I think after the initial crop of free agents sign in the first week then we'll need to get Oubre locked in because I can see teams that came up short elsewhere that are looking to blow their cap space gambling on restricted free agents at that point.