Reasons for Bitcoin's Rise:

Driven by ETF growth, Bitcoin is being purchased by companies that hold it long-term.

Moving away from crypto assets, it resembles a reserve asset, attracting long-term capital.

Reasons for Altcoin's Decline:

Limited liquidity in the crypto market, with most being drawn to Bitcoin.

The altcoin market is highly dependent on emotional fluctuations, with retail FOMO driving prices up, and when emotions peak, the main forces sell off.