剩下多少比特幣？

比特幣的總供應量為2100萬BTC，這是一個固定的上限，如果沒有對協議的共識更改，則無法改變。

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.

比特幣是一種加密貨幣，是由一個不知名的人或一群使用Satoshi Nakamoto的人創建的。這是一種分散的數字貨幣，可以通過對等網絡傳輸，而無需中介。

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.

比特幣是獨一無二的，因為它的總供應量限制為2100萬BTC，這是一個固定的上限，如果沒有對協議達成共識的更改，則無法改變。該有限蓋在協議級別上執行，這對於比特幣的價值主張作為通縮資產至關重要。

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，已經開采了約1960萬BTC，約佔總供應量的93.3％。這留下了大約140萬BTC，尚未創建，剩餘的硬幣將非常緩慢地開採。

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.

這種不均勻分配的原因是比特幣的指數發行時間表，該時間表受稱為“減半”的活動。當比特幣在2009年推出時，Block獎勵為50 BTC。每210,000個街區（或大約每四年）將獎勵切成兩半。

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%.

由於早期的獎勵如此之大，因此在2020年底之前開采了總供應的87％以上。隨後的每次減半都大幅度降低了新發行率的速度，這意味著要開採其餘13％的人需要一個世紀的時間。

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.

根據目前的估計，所有比特幣中有99％將在2035年之前開採，但是由於幾何獎勵的性質，最後一部分（最後的Satoshis）直到2140年左右才能生產。

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.

這種設計的稀缺性，再加上不可變的供應上限，是比特幣與金黃色等物理商品之間的比較。但是比特幣更容易預測：黃金的供應每年增長約1.7％，而比特幣的發行率卻透明地下降。

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？從傳統意義上講，比特幣的供應曲線不是終端。它遵循了一種漸近軌跡 - 一種經濟Zeno的悖論 - 獎勵無限期地減少，但從未真正達到零。採礦將持續到2140年左右，這一點將超過2100萬BTC的99.999％。