The current situation in the cryptocurrency market shows that Bitcoin dominance is experiencing a significant decline, which indicates that Bitcoin's market share relative to the overall crypto market is dropping sharply. However, despite this notable decrease in Bitcoin's dominance, it does not necessarily signal the beginning of a period known as "altseason," where altcoins—cryptocurrencies other than Bitcoin—typically see substantial gains and outpace Bitcoin in terms of price appreciation and market activity. Therefore, while Bitcoin's weakening grip on the market may lead some to anticipate a shift towards altcoins, the conditions for a true altseason do not seem to be in place at this moment.
source: https://blocknews.com/bitcoin-dominance-is-dumping-hard-but-that-isnt-altseason/