比特币减半也就是比特币矿工奖励减半，是矿工处理比特币交易时获得的奖励减至之前的一半。比特币减半是每产生21万个区块的时候会触发比特币奖励减半（一般是四年一次）。
Half of the bitcoin, or half of the bitcoin miner's reward, was reduced to half of the prize that the miner received when dealing with the bitcoin. The half of the bitcoin was the trigger for halving the bitcoin incentive every time 210,000 blocks were created (usually every four years).
BTC减半
一、比特币四年减半计算公式：
1. The four-year halving formula for Bitcoin:
比特币之所以四年减半一次，是由比特币产量代码协议决定的，协议规定每10分钟产生一个区块，刚刚开始时奖励50个比特币，每产生21万个区块后，比特币奖励就减半一次。
Bitcoin was reduced by half every four years by the Bitcoin Production Code Agreement, which provided for a block to be created every 10 minutes, 50 bitcoins to be awarded at the beginning, and the Bitcoin Award to be halved once every 210,000 blocks to be generated.
1、第一次奖励减半从50个BTC减到25个BTC、第二次减到12.5个BTC、第三次减到6.25个BTC、第四次减到3.125个BTC等等以此往下减半，直到比特币总量达到2100万个BTC。
1. Halve the first incentive from 50 BTC to 25 BTC, the second to 12.5 BTC, the third to 6.25 BTC, the fourth to 3.125 BTC, etc. until the total Bitcoin reaches 21 million BTC.
2、每10分钟产生一个区块，一个小时6个区块，得出：365*60*6=52560区块/年。
2. One block per 10 minutes, six blocks per hour, resulting in 365*60*6 = 52560 block/year.
则产生21万个区块时间：210000/52560=3.99543379大概为4年产生21万个区块（四年减半）。
A total of 210,000 blocks were created: 210000/52560 = 3.9953379, or about 210,000 blocks in four years (a reduction by half in four years).
下面给大家分析下比特币三次减半后一年的走势图。
The following is an analysis of the trend one year after three halves of Bitcoin.
二、比特币减半后能100%上涨？
ii. 100% increase in bitcoin by half?
1、比特币第一次减半后走势图（下图）：
1. Trends since the first halving of Bitcoin (see figure below):
图一
上图是2012年比特币第一次减半后一年的行情走势图，从上图可以看出2012年比特币减半前是5美元，减半后到2013年6月份（比特币第一次减半由原来每次产出50个比特币减到25个比特币），比特币用了一年的时候从5美元涨到800美元，涨幅高达15900%。
The figure above shows the trend one year after the first halving of Bitcoin in 2012, when it was five dollars before the halving of bitcoin in 2012, and by June 2013 (the first reduction of bitcoin from 50 bitcoins to 25 bitcoins per output), which increased from $5 to $800 a year, up 15,900 per cent.
2、比特币第二次减半后走势图（下图）
2. Trends following the second halving of Bitcoin (see figure below)
图二
上图是比特币第二次减半从2016年7月到2017年7月的走势图（比特币由每次的25个BTC减半到12.5个BTC），比特币价格从2016年7月的700美金到2017年7月的2500美金，涨幅达 250%。
The figure above is a second halving of Bitcoin from July 2016 to July 2017 (from 25 BTC to 12.5 BTC each), with a 250 per cent increase in Bitcoin prices from $700 in July 2016 to $2,500 in July 2017.
3、比特币第三次减半后走势图（下图）
3. Trends following the third halving of Bitcoin (see figure below)
图三
上图是比特币第三次减半从2020年5月至今走势图（比特币由每次的12.5个BTC减半到6.25个BTC），比特币价格从2020年5月的8700美金到2020年12月的24000美金，涨幅达175%。
The above figure shows the third halving of Bitcoin from May 2020 to the present (from 12.5 BTC to 6.25 BTC each), with the price of Bitcoin rising by 175 per cent from $8,700 in May 2020 to $24,000 in December 2020.
我们从以上三次减半后的走势分析，每次都有不同的涨幅，第一次、第二次、第三次减半的涨幅分别为15900%、250%、175%，同时也证明每次减半后的一年里100%是上涨的。返回搜狐，查看更多
The trend analysis from these three halves shows a different increase, with the first, second and third halves of 15,900 per cent, 250 per cent, 175 per cent and proof that 100 per cent rises in each year after the reduction.
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