<https://blockcast.it/2021/05/02/madman-column-price-analysis-2021-may-2/>
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"【狂人日記】巴菲特投資者大會上，查理芒格痛罵比特幣。5 月 2 日行情分析"
<https://blockcast.it/2021/05/02/madman-column-price-analysis-2021-may-2/>