哥伦比亚大学开始对示威学生进行停学处理后，一批学生占领哈密尔顿大楼，校方声称将开除占领大楼的学生。在历史上哈密尔顿大楼多次被示威学生占领。1968年反战学生占领该楼一周，校方叫来警察清场，抓捕700多名学生、打伤100多名学生，但学校答应了示威学生的所有诉求，包括停止与军方合作、取消在哈莱姆的公园建体育馆、赦免所有示威学生、校长和教务长辞职。1985年学生占领该大楼三周，校方答应学生诉求，剥离对南非的投资。这些都成为学校光荣历史的一部分。

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Date: 2024-06-20| 方舟子

Should I buy bitcoin?

“To the extent it is used I fear it’s often for illicit finance. It’s an extremely inefficient way of conducting transactions, and the amount of energy that’s consumed in processing those transactions is staggering,” the former Fed chairwoman said. Yellen’s comments have been cited as a reason for bitcoin’s recent losses. However, Yellen’s assessment of bitcoin as a inefficient medium of exchange is an important point and one that has already been raised in the past by bitcoin bulls. Using a volatile asset in exchange for goods and services makes little sense if the asset can tumble 10% in a day, or surge 80% over the course of a two months as bitcoin has done in 2021, critics argue. To put a finer point on it, over the past 12 months bitcoin has registered 8 corrections, defined as a decline from a recent peak of at least 10% but not more than 20%, and two bear markets, which are defined as falls of 20% or more, according to Dow Jones Market Data.