剩下多少比特币？

比特币的总供应量为2100万BTC，这是一个固定的上限，如果没有对协议的共识更改，则无法改变。

Bitcoin is a cryptocurrency that was created in 2009 by an unknown person or group of people using the name Satoshi Nakamoto. It is a decentralized digital currency that can be transferred over a peer-to-peer network without the need for intermediaries.

比特币是一种加密货币，是由一个不知名的人或一群使用Satoshi Nakamoto的人创建的。这是一种分散的数字货币，可以通过对等网络传输，而无需中介。

Bitcoin is unique in that its total supply is limited to 21 million BTC, a fixed upper limit that cannot be altered without a consensus-breaking change to the protocol. This finite cap is enforced at the protocol level and is central to Bitcoin’s value proposition as a deflationary asset.

比特币是独一无二的，因为它的总供应量限制为2100万BTC，这是一个固定的上限，如果没有对协议达成共识的更改，则无法改变。该有限盖在协议级别上执行，这对于比特币的价值主张作为通缩资产至关重要。

As of today, May 2, 2023, approximately 19.6 million BTC have been mined, or about 93.3% of the total supply. That leaves roughly 1.4 million BTC yet to be created, and those remaining coins will be mined very slowly.

截至今天，截至2023年5月2日，已经开采了约1960万BTC，约占总供应量的93.3％。这留下了大约140万BTC，尚未创建，剩余的硬币将非常缓慢地开采。

The reason for this uneven distribution is Bitcoin’s exponential issuance schedule, governed by an event called the halving. When Bitcoin launched in 2009, the block reward was 50 BTC. Every 210,000 blocks — or approximately every four years — that reward is cut in half.

这种不均匀分配的原因是比特币的指数发行时间表，该时间表受称为“减半”的活动。当比特币在2009年推出时，Block奖励为50 BTC。每210,000个街区（或大约每四年）将奖励切成两半。

Because the early rewards were so large, over 87% of the total supply was mined by the end of 2020. Each subsequent halving sharply reduces the rate of new issuance, meaning it will take over a century to mine the remaining 13%.

由于早期的奖励如此之大，因此在2020年底之前开采了总供应的87％以上。随后的每次减半都大幅度降低了新发行率的速度，这意味着要开采其余13％的人需要一个世纪的时间。

According to current estimates, 99% of all Bitcoin will have been mined by 2035, but the final fraction — the last satoshis — won’t be produced until around the year 2140 due to the nature of geometric reward reduction.

根据目前的估计，所有比特币中有99％将在2035年之前开采，但是由于几何奖励的性质，最后一部分（最后的Satoshis）直到2140年左右才能生产。

This engineered scarcity, combined with an immutable supply cap, is what draws comparisons between Bitcoin and physical commodities like gold. But Bitcoin is even more predictable: Gold’s supply grows at around 1.7% annually, whereas Bitcoin’s issuance rate is transparently declining.

这种设计的稀缺性，再加上不可变的供应上限，是比特币与金黄色等物理商品之间的比较。但是比特币更容易预测：黄金的供应每年增长约1.7％，而比特币的发行率却透明地下降。

Did you know? Bitcoin’s supply curve is not terminal in the traditional sense. It follows an asymptotic trajectory — a kind of economic Zeno’s paradox — where rewards diminish indefinitely but never truly reach zero. Mining will continue until around 2140, by which point over 99.999% of the total 21 million BTC will have been issued.

你可知道？从传统意义上讲，比特币的供应曲线不是终端。它遵循了一种渐近轨迹 - 一种经济Zeno的悖论 - 奖励无限期地减少，但从未真正达到零。采矿将持续到2140年左右，这一点将超过2100万BTC的99.999％。