Altcoin markets have experienced unprecedented selling pressure, reaching a five-year high, with the cumulative buy-sell difference for altcoins, excluding Bitcoin and Ethereum, plummeting to -$209 billion. This marks a significant shift from January 2025, when the metric was near zero, indicating the last balance of supply and demand. Over the past 13 months, a consistent net sell-off has been observed, with retail investors largely exiting the market and no significant institutional buying detected. Analysts highlight that this trend is not a short-term correction but a prolonged period of net selling pressure lasting over a year, with a noticeable lack of buying power. The market structure suggests a completed capital rotation, yet institutional accumulation remains absent, raising concerns about the future stability of altcoin markets.