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Bitcoin has been up 900% in the past 12 months, but shares in | Cryptography | News

Bitcoin has been up 900% in the past 12 months, but shares in these four Bitcoin mining firms have been up 5,000% in that same period.

Can you guess which publicly traded companies they are?

https://cointelegraph.com/news/bitcoin-mining-stocks-have-outperformed-btc-by-455-over-the-past-12-months