Nvidia poured another $2 billion into CoreWeave this January, snapping up Class A shares at $87.20 each. The chip giant now holds the second-largest stake in the AI cloud operator, nearly doubling its position to push for over 5 gigawatts of data-center capacity by 2030. CoreWeave, which went public last year at a $23 billion valuation after slashing its IPO ambitions, has since inked deals worth tens of billions. But debt piles high. Customers like Meta and OpenAI commit massively, yet skeptics question if Nvidia’s support masks deeper vulnerabilities. The partnership dates back to 2023, when Nvidia first chipped in $100 million alongside a $1.3 billion rental agreement for its own GPUs. Fast-forward to 2026: Nvidia’s latest infusion came amid CoreWeave’s aggressive expansion, including deployments of Nvidia’s Vera Rubin platform and Vera CPUs.…