good topic but needs a bit of correction IMO!
It is believed that the last Bitcoin will be mined only in 2140.
it is not believed, it is mathematically so.
The first million of BTC was mined by Satoshi Nakamoto
this is misleading or at least it is best to say it in a different way. saying it like that may lead some people into thinking bitcoin had some sort of premine which is obviously wrong.
the correct statement is that some people speculate that Satoshi owns somewhere around 1 million coins which he gained from mining a lot of the blocks in first months of bitcoin's release.
we don't know who else was mining, Hal Finney might have been someone who mined some blocks, there were others who might have been interested in the project and "test mined" some blocks,... which means so many of the first 20000+ blocks might have been mined by people other than Satoshi (1 mil / 50
BTC reward = 20000 blocks)
Only 36% of all Bitcoin coins was marked in any transactions and payment transactions. All the remaining coins, about 64% of their total number have never been used. Users are likely holding them with the expectation of an even greater increase in BTC cost.
this is very interesting. you are saying about 6 million bitcoins are in circulation while about 10.8 million are never moved!
do you have any reference for these numbers?