Double ordering is a myth. NVDA/Jensen know who is ordering what and issues the appropriate guidance. Actually, they have a history of being very conservative with guidance. BigTech making chips are for applications, not running LLMs. And remember, once you buy NVDA chips you are also committing to the NVDA Cuda ecosystem and software. The moat is massive.
All signs point to this being very early in the new AI paradigm. First comes the equipment (NVDA). Then comes the makers of the technology/models (MSFT, META, GOOGL, OpenAI). Then comes the applications to the consumers (AAPL). And so on. Surely, there will be bumps in the journey, but AI is truly a revolution for society.
As with everything, manage your risk and needs with appropriate positioning and exposure.