Bitcoin has climbed to a seven-month peak, igniting a sharp surge in FOMO (fear of missing out) sentiment across the market, yet cautionary signals are beginning to surface beneath the surface.

The price breakout is not an isolated event but rather the product of technical repairs converging with fresh capital inflows; however, the buildup of leverage in the derivatives market and the persistent weakness in U.S.-based demand are casting a shadow over this rally, prompting investors to brace for potential correction pressures following a period of short-term overheating.

Looking at the drivers, on September 21, Bitcoin hit an intraday high of $87,395, marking its strongest level since January 29, with the asset trading at $85,326 at the time of writing, reflecting a 24-hour gain of 4.90%. A critical technical pillar for this rebound is the weekly close reclaiming the 50-week moving average, which historical patterns suggest often acts as a confirmation signal for a bear-market bottom.

Simultaneously, a short squeeze has emerged as the primary engine propelling prices upward. Data from Coinglass reveals that total cryptocurrency liquidations reached $746.6 million within 24 hours, with short positions accounting for $647.9 million of that figure, forcing bears to cover and driving trading volume up 39% to $224 billion.

Sentiment gauges are also reflecting extreme optimism. Santiment records show that since December 2024, bullish Bitcoin mentions on social media have hit 954, far outpacing bearish comments at 269. Meanwhile, the Crypto Fear & Greed Index has climbed from 69 a week ago to 70 on Monday, and then jumped to 78, pushing into the "extreme greed" territory. Notably, discussion momentum on platform X has reinforced this trend, though the core data points toward a broad overheating in market sentiment.

The capital-side support primarily stems from corporate accumulation and ETF inflows, but the composition reveals notable divergences. Strive acquired 1,355 Bitcoin between September 14 and 18, spending $107.7 million, a significant increase from the 469 coins purchased the previous week, lifting its total holdings to 26,355 coins.

Strategy (NASDAQ: MSTR) resumed buying after a two-week pause, snapping up 950 coins to bring its total stash to 846,000. Data compiled by Woofun AI shows that spot Bitcoin ETFs attracted $999 million in inflows on September 21, the highest single-day total since October 6, 2025, pushing net assets from $102.5 billion to $110.1 billion.

However, a monthly comparison reveals signs of cooling demand: September has seen only $1.3 billion in inflows across 14 trading days, well below August's $3.5 billion, indicating that institutional appetite for sustained buying is waning.

Despite the outward exuberance, two major concerns are building. First is the leverage risk, with open interest in derivatives rising 7.59% to $156 billion, showing that traders are not reducing exposure but rather opening new positions. Santiment notes that markets often punish widely held expectations, and while the current sentiment spike carries less risk than last week's panic phase, it could still trigger a reversal.

Second is the weakness in U.S. spot demand. The Coinbase premium index remains at -0.028, a slight recovery from early September lows, but the negative reading signals insufficient buying pressure from domestic U.S. investors. If this metric fails to turn and stay positive, this rally may prove to be nothing more than a transient burst driven by short covering rather than a genuine trend shift.

Investors are advised to seek further in-depth analysis via official channels, but the core takeaway remains: a leveraged bull run lacking domestic demand support is built on shaky foundations.