Experts estimate that about 1,000 users, known as “whales”, control 40% of bitcoins, raising concerns whales may collude to manipulate cryptocurrency markets (Olga Kharif/Bloomberg)

Olga Kharif / Bloomberg: Experts estimate that about 1,000 users, known as “whales”, control 40% of bitcoins, raising concerns whales may collude to manipulate cryptocurrency

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