Dismissing negative attacks entirely might be shortsighted.  While Bitcoin has weathered past storms, the potential impact of a coordinated attack shouldn't be underestimated.  Imagine a well-crafted campaign that highlights security vulnerabilities, environmental concerns, or regulatory scrutiny.  This could create uncertainty among some investors.

The focus on Bitcoin's market dominance is valid.  Its historical performance and current market share are undeniable.  However, the cryptocurrency market is volatile and constantly evolving.  Newcomers like Ripple could potentially challenge Bitcoin's position if they address scalability concerns and offer attractive features.