Market pundits have varying perspectives on whether Nvidia's market share is at risk, but many believe strong demand for its AI chips will persist despite its recent stock fluctuations. Factors like growing competition, US export restrictions to China, and potential shifts by major clients do pose risks however. But that is what happens in business and aren't really new phenomena. 

I see this downturn as a strategic buying opportunity for long-term investors potentially. Price targets vary, with some suggesting a potential entry point in the low $170s and others seeing significant upside. So it's a mixed bag. So, one pragmatic approach would be to not go in all out but in tranches and only after due analysis with conviction & not as a knee-jerk reaction. And be patient.