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The mining profitability of Bitcoin Cash (BCH) has just passed that of Bitcoin (BTC). The result of this flip in mining profitability is already visible in the value of BCH, which has risen roughly 70% in a single day, from $300 to $500.
Bitcoin is holding relatively steady, dipping slightly from $4,400 to $4,200. This is likely just the beginning though. We can expect to see more volatility in the upcoming days, as news of this flip becomes more widespread.
The shift in mining profitability is a result of several difficulty adjustments on the Bitcoin Cash network. You can observe the ratio of mining profitability between BTC and BCH in the chart below.
Image from ztnark.com
This mining profitability crossover brings Bitcoin Cash into a competitive space with Bitcoin, as mining Bitcoin is no longer more profitable than Bitcoin Cash. It will be interesting to see how this pans out.