A truly brutal bear market—its downside potential and panic atmosphere completely exceed market expectations. Yet Bitcoin’s four-year halving cycle always keeps a fixed rhythm, never going off track. The new halving took effect on April 20, 2024. Industry iron rules deliver steady output: eighteen months after the halving, it sets a cycle high; then, for the next twelve months, it continues a long, gradual downtrend and base-building, finally bottoming out at the lowest point of this cycle. The timing is precise: October 2025 is the eighteenth-cycle node after the halving, and Bitcoin’s all-time high for this round is locked at $126,200. Immediately after that, there is a full year of deep sell-off. The ultimate bottom time is fixed at October 6, 2026. Historical Bitcoin market behavior across years shows that every bear market bottom requires a long period of sideways consolidation to grind down. Therefore, late 2026 and early 2027 are the ideal windows to stage bargain buys. Looking back at the 2021–2022 bull-to-bear transition: Bitcoin’s maximum drawdown was 77%—from a bull-market peak of $69,000 down to a major bottom at $15,500. It then traded sideways below $20,000 for more than three months. Based on a 77% retracement from the $126,200 high in this round, the theoretical low is about $29,000. The three-cents thousand range is the core defensive bottom. In extreme conditions, there is a possibility of dipping slightly below $30,000. But the Bitcoin bottom range for this cycle should hold steady between $30,000 and $60,000. At that time, it will surely break through the previous cycle’s $69,000 historical bull-market high. Once the price falls into this range, it becomes a 100% certain “all-in” opportunity. Only when all three major convergence conditions are met should you enter: after October 2026, Bitcoin price between $30,000 and $60,000, and a fear index around 10. When all three are achieved, the probability of profit is 99%. Hold firmly until 2029, waiting for the rally to push into the $150,000 to $250,000 range, then exit in batches. By the end of 2026, market negative news will fully explode—talk of Bitcoin’s “death bubble” and the “network-wide hash-rate attack crisis” narrative will continue to spread. The market won’t just be cold and ignored; it will also be unanimously judged across the entire network as Bitcoin having completely entered a bear phase. Today, no one dares to predict the next super bull market either—this is exactly the same extreme fear as the $15,500 bottom of the last cycle. Back then, breaking below the $20,000 highs of 2017 made everyone worry that Bitcoin could never break through $100,000 or even $150,000. But cycle calculations have never been wrong. This time, it successfully broke through the $100,000 level and reached the peak of $126,200, delivering an eightfold gain. Although it didn’t reach the $150,000 target, the cycle logic is fully intact. Late 2026 is the best “all-in” bottom-buying node.