This is the top-10 of PoW coins by daily issuance as seen on https://onchainfx.com/v/SMT45r
1 Bitcoin (BTC) $5,393,765
2 Ethereum (ETH) $1,747,661
3 ZCash (ZEC) $372,245
4 Litecoin (LTC) $325,547
5 Bitcoin Cash (BCH) $173,238
6 Dash (DASH) $115,834
7 Monero (XMR) $105,949
8 Ethereum Classic (ETC) $93,079
9 Digibyte (DGB) $34,164
10 Dogecoin (DOGE) $28,275
$500 million in 6 months implies a daily issuance of $2,732,240, putting Grin in 2nd place.
I seriously don’t see that happening… although it deserves a place in the top-10.