Solana's 36% Monthly Gain Tops Majors—Which Crypto Rally Holds?

Investors evaluating crypto exposure face a classic risk/reward problem: Solana's 36.02% monthly gain and XRP's 36.09% jump look attractive, yet both assets are still down roughly 50% over 12 months and driven increasingly by leveraged derivatives. The rotation of open interest into altcoins for the first time since December 2024 signals that the rally may be more speculative than fundamental.

Four of the largest cryptocurrencies posted double-digit gains over the 30 days ending September 7, 2026, but the rally's durability is in question because every asset remains underwater year-to-date and over the past 12 months. As of September 7, Bitcoin traded at $78,000, Ethereum around $2,490, XRP at $1.40, and Solana at $103. Their 30-day gains were 20.98% for Bitcoin, 29.78% for Ethereum, 36.09% for XRP, and 36.02% for Solana. That superficially impressive run masks longer-term damage: even the best performer year-to-date, Bitcoin, is still down between roughly 8% and 10%, while XRP's 12-month loss of 50.86% and Solana's 49.94% show how far these assets remain from prior levels.

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As of September 7, Bitcoin traded at $78,000, Ethereum around $2,490, XRP at $1.40, and Solana at $103.

The one-week numbers suggest the rally has already started to slow. XRP was still up 2.51% over seven days, but Ethereum and Solana posted smaller gains and Bitcoin was essentially flat. That deceleration is a classic warning sign: a rally that cannot maintain weekly momentum against a strong 30-day base may be rolling over. The source analysis frames the next few weeks as critical in determining whether the gains hold or begin to fade.

The most important market-structure signal is the shift in derivatives positioning. Altcoin open interest surpassed Bitcoin's on September 6, 2026, for the first time since December 2024. That indicates speculative capital is rotating into higher-beta altcoins. Historically, when altcoin open interest exceeds Bitcoin's, the market is often in the late stage of a risk-on phase. The Crypto Fear and Greed Index sits at 74, reflecting greed but not yet extreme greed. The combination of rising altcoin leverage and a greed reading of 74 suggests that the rally is increasingly built on borrowed conviction rather than organic spot demand.

Which gain actually holds? Bitcoin has the shallowest 30-day advance at roughly 21% to 24% depending on the data snapshot, and the smallest year-to-date loss. It is therefore ranked most likely to hold its gain. Bitcoin's move from $78,000 is more consistent with steady spot accumulation and institutional exposure than with a leveraged altcoin spike. Altcoins, by contrast, face a high-stakes test: their gains are steeper, their 12-month losses are much larger, and their rallies depend heavily on continued risk appetite. XRP's 36% one-month gain from $1.40 is notable, but it remains down 50.86% over 12 months. Solana's 36% gain sits atop a 49.94% 12-month decline. Ethereum, up 29.78%, has less extreme 12-month losses but lacks the same headline catalyst momentum as XRP or Solana.