Market analyst Tony Severino has issued a stark warning that Bitcoin (BTC) could be on the verge of a major downturn, potentially losing 50% or more of its value, based on a historical pattern observed in its correlation with the S&P 500 stock index. The analysis comes as Bitcoin trades around $68,584, having erased gains from recent geopolitical events and re-entered a consolidation phase.
The core of the warning revolves around the 20-day and 20-week Bitcoin-S&P 500 Correlation Coefficient. This metric, which ranges from -1 (perfect negative correlation) to +1 (perfect positive correlation), recently dipped to around -0.5 as Bitcoin fell while equities rose. However, it has since sharply rebounded to approximately -0.10 for the 20-day metric and 0.13 for the 20-week metric.
"Historically, when Bitcoin's correlation with the S&P 500 drops to -0.5 on the Correlation Coefficient, and then turns sharply up, it is a warning sign that the stock market is going to collapse and take BTC with it," Severino stated in an X post on March 21, 2026. He notes that this specific sequence—a drop to -0.5 followed by a sharp reversal—has preceded significant Bitcoin sell-offs in the past, including in 2018, 2020, and 2022.
The historical pattern suggests an initial price bounce lasting 10-17 weeks before the major drawdown begins. The current rebound, which started in early February 2026 and is now 8 weeks old with a net gain of 4.89%, is seen as potentially fitting this preliminary phase. If the pattern repeats, the subsequent correction could result in a price decline of 50% to 80% from the peak of this bounce. A 50% drop from current levels would place Bitcoin near $34,350, aligning with other analyst projections for a drop to the $30,000–$40,000 range in 2026.
Macroeconomic conditions are cited as supporting this bearish outlook. Elevated oil prices, persistent inflation, and reduced expectations for Federal Reserve interest rate cuts are creating pressure on all risk assets, including Bitcoin and equities. Furthermore, a pause in corporate accumulation is noted, with MicroStrategy (MSTR)—a major Bitcoin holder—not making new purchases via its stock sales this week, potentially removing a key source of buying support and leaving BTC more exposed to a broader market sell-off.
