I made it to Diamond 1 level (or whatever it was called) in the head to head coin games, realised there was nothing there, so stopped bothering. I pick the apparel that makes my avatar look stylish or humorous or ridiculous, depending on mood, and only do coin games for the Turf Wars. Even then, there's no apparent point to those, so if I don't have a spare CC pass I don't bother.
I think it's quite amusing that someone puts their energy into manipulating a completely irrelevant part of the game. Yay, you have the most utterly worthless coins! Hooray! Go nuts spending them on.... ummm....yeh, good luck with that.
It would be good if they made Turf Wars feel a bit more interesting by perhaps having matchplay directly against the opponents from the other CC, or similar. Maybe even properly handicapped so Legends hit from Legend tees, Pros from Pro tees, etc. It's a complete waste of time from a modest CC to play some crew that puts up 20 million coins in an hour - no point in earning 4500, or 90,000, or anything against that.