Elon Musk’s proposed $20 billion undersea Hyperloop between New York and London is an ambitious vision, but it faces extreme technical, financial, and logistical hurdles. While advancements in tunneling and automation could lower costs, a project of this scale would still require unprecedented engineering solutions. Oceanic pressure, seismic activity, and maintaining a vacuum-sealed tunnel over 3,000 miles make it far riskier than land-based Hyperloop concepts, which themselves remain unproven a