footnote added

pratik147 · Jul 25, 2018 · 0ee05d6 · 0ee05d6
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diff --git a/比特币的三个经济阶段/README.md b/比特币的三个经济阶段/README.md
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 [27] 在垄断挖矿机构能敲诈比特币商户的前提下（通过筛选交易），投资到挖矿和其分散式扩张能让对手难以针对某一商户。虽然两者仍未发生，但这做法有一定的意义。
 
-[28] [en.wikipedia.org/wiki/Inflat…](https://link.juejin.im/?target=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FInflation%23Positive)
+[28] [en.wikipedia.org/wiki/Inflat…](https://link.juejin.im/?target=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FInflation%23Positive)
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+[30] [en.bitcoin.it/wiki/Prohib…](https://link.juejin.im/?target=https%3A%2F%2Fen.bitcoin.it%2Fwiki%2FProhibited_changes)