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Square, another payments company, bought $50 million of Bitcoin and changed its name to Block, in part to signify its work with blockchain technology. Tesla bought $1.5 billion of it. The venture capital firm Andreessen Horowitz raised $4.5 billion for a fourth cryptocurrency-focused fund, doubling its previous one.
Excitement hit a peak in April last year when Coinbase, a cryptocurrency exchange, went public at an $85 billion valuation, a
