Bitcoin's Bull Market Points to 'Uptober' — What History Says

Bitcoin ($BTC) has oscillated between roughly $83,000 and $85,000 since dipping into that range on Wednesday, September 23. The four-day consolidation followed a strong advance from $76,000 to $87,000 the previous week. Volatility compression of this kind typically signals that another strong move is building, and the key question is whether the next impulse extends the rally or gives way to a deeper retracement. On-chain data and historical seasonality offer clues on whether swing traders and investors expect a deeper pullback or a bullish continuation.

The findings were detailed in an analysis by AMBCrypto.

'Uptober' Seasonality Aligns With a Regime Shift

In a post on X, popular crypto analyst Ali Martinez pointed out that October has historically been a bullish month for Bitcoin, with gains recorded in 10 of the previous 13 years. September — historically a bearish month — was also on course to end bullishly this year. According to Martinez, that combination could power a stronger October, the so-called “Uptober” seasonal effect, as $BTC transitions to a bullish regime.

Demand-side indicators pointed the same way. Bitcoin has been flowing out of exchanges, and spot ETFs recorded nearly $3 billion in inflows within ten days, which the analysis described as signals of strong demand and bullish sentiment.

Crypto analyst Axel Adler Jr. noted that the Adjusted MVRV 30DMA/365DMA ratio crossed above its own 365-day moving average on August 20, marking an early bull market transition. MVRV — market value to realized value — compares Bitcoin's market capitalization with the value of coins at price they last moved on-chain, so a ratio above the 1.0 baseline indicates the average holder is sitting in profit.

The ratio then climbed above the 1.0 baseline on September 20, confirming a regime shift from early bull market to bull market — the sixth such early-bull-to-bull transition since 2012. In four of the five most recent crossovers, the bull phase ended with Bitcoin prices above the entry price of the regime shift. The lone exception was August 2015, when the bull market ended 16 days after it began and the $BTC market fell back into early bull territory — a reminder that these transitions can also prove short-lived.

Warning Signs for Bitcoin

The recent rally pushed unrealized profit margins to 33%, their highest level since December 2024. Profit-taking selling spiked to 25.7k $BTC, the highest recorded in 2026. Elevated margins mean holders are carrying larger paper gains on unspent coins, which is why analysts track profit-taking volumes as a gauge of whether a rally is cooling.

Analyst Julio Moreno noted that these conditions are typical of a rally losing steam and at risk of a deeper correction.

Summary

Bitcoin's Adjusted MVRV scores indicated an early bull market phase for about a month before shifting into a bull regime a week ago. At the same time, the spike in profit-taking and unrealized profit margins at their highest levels since December 2024 stand as warning signs of a possible $BTC correction deeper than the pullback of the past week. Whether October holds to its 10-of-13 seasonal record, profit-taking recedes from its 2026 high, and ETF inflows and exchange outflows persist are the markers to watch as the market weighs that tension.