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Using daily OHLC data, Bitcoin’s August 2017 range was roughly $2,685.61 low to $4,736.05 high — a spread of about $2,050.44. The high came on Aug. 31, per StatMuse’s August 2017 BTC table; CoinMarketCap also provides historical BTC daily data here.

In August 2017, Bitcoin traded between a low of about $4,224 and a high of $4,736. Wild times leading into that massive run-up later in the year[1]