Altcoins are on the verge of a significant breakout as the OTHERS/BTC monthly chart approaches the apex of a 5-year descending triangle. This technical pattern, historically linked to major market shifts, suggests a potential reversal against Bitcoin's dominance, which currently stands at 56.1%. Prominent analyst @cryptosymbiiote predicts a "massive reversal" for altcoins, sparking discussions within the Web3 community. The OTHERS/BTC ratio, representing the market cap of all cryptocurrencies excluding Bitcoin, is nearing a critical point. With the total crypto market cap at $2.391 trillion and Bitcoin's at $1.342 trillion, the ratio hovers around 0.782, close to multi-year support. A breakout above the triangle's resistance could signal the start of an "altseason," where altcoins outperform Bitcoin significantly. However, regulatory uncertainties and macroeconomic factors add complexity to the current landscape. As the market approaches this pivotal moment, investors are advised to monitor volume spikes and RSI divergences for confirmation of the breakout. The outcome could lead to substantial gains for sectors like AI, DeFi, and layer-2 scaling, or further entrench Bitcoin's dominance if the trend continues downward.