VanEck Cryptocurrency Heat Index issues a buy signal, Bitcoin shows signs of a bull market for the first time since hitting bottom in 2025

As market sentiment gradually stabilizes, Bitcoin and the overall cryptocurrency market are sending positive signals. Research from VanEck’s MarketVector Indexes, a leading asset management firm, shows that its Cryptocurrency Heat Index has issued a clear buy signal for the first time since the market bottomed out in April 2025, attracting significant investor attention.

According to Martin Leinweber, head of MarketVector Indexes, the MarketVector Cryptocurrency Heat Index is a data-driven market “thermometer” used to gauge whether the crypto market is undervalued, neutral, or overheated. Unlike traditional fear and sentiment-based indicators, this index combines structural data, technical indicators, and proprietary moving averages to trigger systematic buy or sell signals when market conditions change.

Currently, the index reading stands at 16.8%, entering the deep undervaluation zone. Leinweber pointed out that its proprietary moving average has recently turned bullish, which is often regarded as an important signal of a medium-term trend reversal. He stated that market breadth is improving, with more and more crypto assets outperforming Bitcoin, indicating that the market may have moved out of the previous panic-selling phase.

Leinweber shared on social media that for investors currently under-allocated to cryptocurrencies, this could be a key window to reassess their portfolios rather than passively entering after a clear price rebound. He believes that overall market sentiment may already be close to the bottom of this cycle.

Matthew Sigel, Head of Digital Asset Research at VanEck, also reposted the analysis, noting that its internal market breadth model has also triggered Bitcoin’s first bullish signal in months. This further reinforces market expectations of a phase bottom for Bitcoin.

Previously, VanEck emphasized Bitcoin’s four-year cycle characteristics multiple times. The firm believes that after a relatively sluggish performance, with the improvement of global liquidity conditions and the return of institutional funds, there is significant room for Bitcoin prices to recover and rebound in 2026. Overall, the latest signals from the VanEck Cryptocurrency Heat Index may provide important forward-looking guidance for the next Bitcoin bull market.