The volatility inherent in the cryptocurrency sector has delivered a sharp blow to mining stocks, with the world’s five largest Bitcoin miners shedding a combined $14.2 billion in market capitalization over the last six weeks. According to data presented by BestWallet.com, this downturn marks the most severe plunge for the sector since the 2022 crypto market crash.
For the majority of 2025, mining giants Iris Energy, Cipher Mining, TerraWulf, Riot Blockchain, and Core Scientific enjoyed a bullish run, riding the wave of Bitcoin’s ascent. By mid-October, their combined valuation had swelled to $45.6 billion, representing a $30.3 billion gain in just ten months.
However, the market sentiment shifted drastically following Bitcoin’s retreat from its all-time high of over $127,000 in October to roughly $87,400 this week. Because mining stocks often trade with a higher “beta” than Bitcoin itself—swinging two to four times harder than the asset they mine—the 30% drop in BTC prices triggered a massive sell-off in mining equities.
While the downturn was sector-wide, specific companies bore the brunt of the damage:
- Riot Blockchain suffered the steepest decline, losing 41% of its value ($3.3 billion).
- Iris Energy, previously the year’s fastest grower, saw a 34% drop, wiping out $6.2 billion.
- Cipher Mining declined by 28% ($2.2 billion).
Despite this $14.2 billion wipeout, early investors remain profitable. All five companies are still trading well above their valuations from a year ago. Iris Energy remains up by a staggering 498% year-over-year, while Cipher Mining and TerraWulf maintain triple-digit annual gains, proving that despite recent headwinds, the 2025 mining narrative remains overwhelmingly positive.