was arbitratry for bitcoin also? i remember 21M come up from a math equation or some other calculation
50 BTC every 10 minutes, halved every 4 years --> 21 million BTC total
Other coins use different numbers and different distribution plans. Many coins are not capped.
so satoshi started from the block reward, to build bitcoin
Not really. You can also start from the total number and then work backwards.
then my point stand, why he choose 21M? you know you could change 10 to 12, 50 to 60 ecc...