Re: 21 million units what is the reason for reaching this value?

Quote from: Cz-Silk on Today at 12:46:24 PM

Why only put 21 million units in the source code?

Bitcoin will not reach 21000000 because every 210000 blocks you are only allow to create half of the previous btc allows to be created. So since the Genesis block is 50 Btc, it can be divided by half into 33 times.
Like this:

(1st)50 Btc
(2nd)25 Btc
(3rd)12.5 Btc
......
.......
(33rd)0.00000001 Btc

If you add it all, you will get a total of 20999999.9769 Btc. So because the Genesis block is unspendable, the only Btc left is 20999949.9769.

For more details here: https://bitcoin.stackexchange.com/questions/38994/will-there-be-21-million-bitcoins-eventually/38998#38998