Just noticed Bitcoin is basically at the 20 million mark now - we're talking 20,014,050 BTC in circulation already, which means over 95% of all the bitcoin that will ever exist is already out there. It's wild to think about when you consider the original vision.

Satoshi locked in that 21 million cap from day one to create true digital scarcity, something completely different from fiat that central banks can just print whenever. The fixed supply is actually the whole point - it's what makes Bitcoin "hard money" in the first place. You can't just decide to change it without fundamentally breaking what Bitcoin is supposed to be.

Here's the thing though - while 95% is already mined, we're nowhere near done. The final million BTC will take another 114 years to mine. Yeah, you read that right. At current issuance rates with about 450 BTC coming out daily, we won't see the last coin until around 2105, and even then there's fractional issuance that continues until roughly 2140. So when will all BTC be mined? Basically not in our lifetime.

The halvings are doing their job - cutting miner rewards roughly every four years, which keeps inflation below 1%. It's this predictable, transparent curve that's baked into the protocol. Can't game it, can't accelerate it, can't slow it down. That immutability is actually the whole security model.

What's interesting is the shift happening for miners. As new supply dries up, they're going to have to rely almost entirely on transaction fees. That's a massive economic transition that hasn't really been tested at scale yet. The network's long-term security and economics basically depend on how that plays out.

For the scarcity narrative though, this 20M milestone is huge. Every time we cross these thresholds, it reinforces how far along Bitcoin's supply curve really is. We're in the final stretch of the easy mining days. By January 2035, 99% of Bitcoin's total supply will already be mined. After that, it's all about the fee economy and network effects.