4月18日，本是悠闲的周末时光，比特币玩家们却恐怕要失眠了。
美国最大加密货币交易所之一Coinbase的上市尚未过两天，余热还未散去，比特币及其他加密货币却集体出现大幅下挫。
北京时间4月18日11点左右，此前一直维持在61000万美元左右的比特币突然转跌，一度跌至52000美元，跌幅超15%。截至发稿，特币价格稍回升，为55595.74美元，24小时内跌幅达10.54%。
与此同时，以太币（ETH）、瑞波币（XRP）、莱特币（LTC）等其他较为主流的加密货币价格也集体进入波动期，跌幅悉数达两位。
以太币（ETH）跌幅超11%。
瑞波币（XRP）和莱特币（LTC）均跌超20%。
.
而受马斯克效应涨幅一度达250%，总市值一度突破600亿美元的狗狗币，最近24小时内也跌了14.22%。
24小时47万人爆仓，379亿灰飞烟灭
这之前，比特币整体持续走高。4月13日，比特币价格触达62308.8美元/枚，突破6.2万美元门槛，创下历史新高。随后，受Coinbase即将上市刺激，比特币价格于4月14日再创新高，攀至63000万美元台阶，期间一度涨至64439.29美元。加密货币“老二”以太币同期也连带冲至2317美元，同样创刷新了记录。虽然在Coinbase上市的首个交易日内，或许因市场消化了利好，比特币价格未见大幅变动，却也一直维持在63000美元上方。
加密货币此次集体大跌也并非出人意料，比特币两位数的跌幅也常见。此前，在特斯拉购入15亿美元比特币以及一众机构连番刺激后，彼时在57000美元上方落脚的比特币随后也跌回45000附近。
异变必然引发熟悉的爆仓。比特币家园网数据显示，全网加密货币过去一小时爆仓达44.86亿美元（约合292.52亿元人民币(6.5293, 0.0087, 0.13%)），过去24小时有超过47万人爆仓，爆仓量达58.11亿美元（约合378.93亿元人民币）。
马斯克疯狂安利的狗狗币也跌了
马斯克多次“带货”的狗狗币也跌超13%。
随着狗狗币价格的暴涨，不少持有狗狗币的玩家也赚得盆满钵满。此前一位网友晒出自己的暴富记录：在2月以0.047美元的价格买入约400万个狗狗币，如今暴涨700%，他一跃成为百万美元富翁。
为何突然遭血洗？
数字货币为何集体大跌？从消息面上看，主要有三个原因。
第一个原因是，市场有传闻，美国财政部将指控多家金融机构使用加密货币进行洗钱。在此之前，美国财政部长耶伦和美联储主席鲍威尔都对数字货币表达过负面意见。
另一边，各国央行似乎加紧了对加密货币的监管。当地时间4月16日，土耳其央行表示，因数字代币背后的匿名特性带来了“不可挽回”损失的风险，将从4月30日起禁止使用加密货币作为支付形式。该项法令同样也禁止支付公司的加密货币平台交易。
缺乏监管、监督机制、潜在的犯罪活动，加之其价值的高波动性，意味着数字代币面临“重大风险”，声明称。
欧洲央行（ECB）行长拉加德（Christine Lagarde） 在1月曾警示比特币助长犯罪活动；印度政府此前也禁止了相关加密货“币交易。
第三是刚刚上市不久的Coinbase遭遇高管抛售。据Cointelegraph消息，根据资本市场实验室数据以及Coinbase投资者关系网站的文件显示，Coinbas CEO Brian Armstrong以三笔价格不同的交易出售了749999股，总计约2.92亿美元。CFO Alesia Haas以388.73美元的价格出售了全部的255500股，总计约9932万美元。这一消息可能意味着即使是交易平台本身对于数字货币交易前景也不看好。
值得注意的是，就在暴跌之际，首只反向比特币ETF也于4月15日问世。Horizons ETF首席执行官史蒂芬·霍金斯（Steve Hawkins）的声明显示，其推出的反向比特币ETF（代码为BITI）允许投资者建立比特币期货的空头头寸；同期上市的姊妹产品BetaPro比特币ETF（代码为HBIT）则将收取1.00%的费用，并跟踪比特币期货。
大投行们却看好后市？
高盛（Goldman Sachs）在当地时间4月14日举行的一季度财报发布会中表示对加密资产（虚拟货币）的需求仍然很高，虽然比特币等虚拟货币正被探索作为一种价值存储的方式，其轨迹目前仍不清晰，但客户正在使用这些虚拟货币服务，由此意味着对加密货币需求的增长。
而其对手摩根士丹利（Morgan Stanley）、富达投资（Fidelity）、纽约梅隆银行（Bank of New York Mellon Corp．）、贝莱德（BlackRock）早已初入加密货币领域。
反向比特币ETF问世
近期币圈热点颇多，coinbase上市、BNB、狗狗币暴涨等因素，让一则颇有价值的信息被湮没：全球首只反向比特币ETF已在多伦多交易所上市，这将为投资者提供一种无需使用保证金账户或做空期货就能做空比特币的方式。
Horizons ETF宣布推出BetaPro比特币ETF（代码为HBIT）和BetaPro反向比特币ETF（代码为BITI）。这些ETF于4月15日在多伦多证券交易所（TSX）上市。
Horizons ETF首席执行官史蒂芬·霍金斯（Steve Hawkins）的声明显示，其推出的反向比特币ETF（代码为BITI）允许投资者建立比特币期货的空头头寸；同期上市的姊妹产品BetaPro比特币ETF（代码为HBIT）则将收取1.00%的费用，并跟踪比特币期货。
“购买HBIT和BITI就像通过经纪商购买股票和其它ETF一样简单，它不需要投资者开立单独的加密货币账户。此外，BITI将为投资者提供一种无需使用保证金账户或做空期货就能做空比特币的方式。”蒂芬·霍金斯称。
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