Bitcoin - 12.5 coins per block, 6 blocks per hour = 1800 coins per day x $3600 = $6,480,000 cash injection required per day to maintain current price
Grin - 50 coins per block, 60 blocks per hour = 72,000 coins per day x $6.5 = $468,000 cash injection per day to maintain current price.
Therefore Grin requires 7.2% of the cash injection of Bitcoin on a daily basis to maintain its current price.
Is Grin worth 7.2% of Bitcoin at this time? Definitely not. It is an untested coin with extremely low adoption and a serious pain in the ass to transfer as both parties have to cooperate to make a transfer happen.
Conclusion: Grin is currently highly overvalued at $6.5
Indeed it's overvalued. Sweat at the joker who made one of the first purchases at $261