Inside “Stargate” and “Colossus”: AI’s $500Bn Mega-Projects Raise Bubble Fears

The $3 trillion AI datacenter boom is entering a new phase of mega-projects, such as the $500bn “Stargate” venture (OpenAI, Oracle, SoftBank) and Elon Musk’s “colossus.” These “all-in on AI” projects are driving “exuberance,” but also raising “bubble” fears.
These projects are “specifically intended to support AI workloads” and are being built at a massive scale. “Stargate” is planning a network across the US and UK. Microsoft is building the “world’s most powerful AI datacentre” in Wisconsin. This is part of a global build-out that will see 10GW of new capacity start construction this year.
This “incredible” spending is backed by soaring valuations (Nvidia at $5tn, Microsoft at $4tn). But the “speculative” nature of these massive, single-purpose projects is what worries critics. Alibaba’s chair, Joe Tsai, warned of a “bubble” in projects raising funds “without commitments from potential customers.”
This skepticism is backed by the Uptime Institute, which cautions “many” announced datacenters “will never be built.” Furthermore, an MIT study showing 95% of AI pilots have “zero return” questions who will pay for these expensive, specialized facilities.
While “Stargate” and “colossus” represent the peak of AI ambition, they also represent the peak of the financial risk. They are the ultimate “speculative assets” that will either define the future or become monuments to a “debt-fueled” bubble.