⭐ Merited by Hueristic (1)
The emission rate is just to high, I think this coin will end like zec...
ZEC problem is that have no community. But it have strong corporation support. Grin will be exactly opposite. Corporations will hate it.
Did you guys hear the news about BitGrin? Its only relevant because its a fork of Grin that supposedly had a cap of 21 million coins ever to be minted. However, a review of the code reveals that the developer slipped in an extra 5 BILLION coins during a fork. 
It will take 150 years for Grin to reach 5 billion Grin. Long long time.