I just saw that we are almost at 20 million BTC mined. In fact, according to the latest data, we have already surpassed that figure: we are at 20,020,043 BTC in circulation. The interesting thing is that this represents 95.33% of the maximum supply of 21 million that Satoshi Nakamoto set in the original protocol.

What I find fascinating is the math behind this. We already have almost the entire fixed supply in circulation, but that last 1 million BTC? It will take more than a century to mine. Currently, the daily production is around 450 BTC, and with the halving that occurs every four years, Bitcoin's inflation has dropped to less than 1%.

If we keep this pace, 99% of the supply will be mined before January 2035. But the last full bitcoin is only expected around 2105, and mining would end around 2140. It's interesting to think that someone starting mining today probably will never see the last BTC being mined. Satoshi really designed this for the long-term game.