Bitcoin dominance is only a metric, meaning it's not the cause of something, including "the biggest challenge price to altcoins movements," as OP said. It's Bitcoin itself that people see as more valuable compared to others because it's the market leader. Bitcoin is also filled with good news, such as ETFs, crypto reserves, El Salvador's legal tender, etc. So, to answer the question in the title, well, it depends on what upcoming good news Bitcoin brings compared to altcoins.
- 2017 was about Ethereum.
- 2021 was about DeFi and NFTs.