I think it could be easy.

As you all know here, there can be only 21.000.000 BTC in the world. So it was predetermined by the creator. But it seems to me that the turnover will be less than this figure.

And here's why I think so:
- By now, many people have lost access to their wallets\coins forever, i.e. some % of BTC have already been taken out of circulation.
- It should be added that some people in the future will also lose access to their wallets\coins for various reasons. Unforeseen circumstances happen in life and there are many such examples. This, in turn, further increases % of irretrievably lost BTC.
- Most of BTC mined by Satoshi is stored on he's wallet. Most likely, if Satoshi doesn't return, then this part of the coins is also lost forever.

So it turns out that there will never be  21.000.000 BTC in circulation. Their maximum possible number is already less than this figure and will only decrease over the years, which will add even more value to BTC.

1 BTC not = 1 BTC. Value of 1 BTC above 1 BTC.

I ask you to understand and forgive if somewhere I expressed myself put it not quite right and correct me or add what I may miss.