he first four years of Bitcoin emission rate are identical to the first four of Grin. Bitcoin had a full reward for 4 years, followed by half that for the following 4 years. So compared to a constant supply, after 8 years, the total amount of coins emitted is only 33% less. Compare that to daily price fluctuations（is there not completed？）.

I think there is a mistake in github: it is 25% less.
we are being harsh with grin here

let’s say grin and bitcoin issue 100 coins during the first 4 years. then after 8 years bitcoin has issued 150 coins (halving at the 4th year) and grin 200.
200*(1-25%) = 150, hence the 25% (and not 33)

the confusion has maybe come from the fact that 150*(1+1/3)=200, which translates into Grin has issued 33% more coins than bitcoin after 8 years.