All of the Price to Sales (P/S) ratio are historically high in my opinion.
E.g. at PS ratio of 5, it will take a company 5 years to accumulate revenue that matches is market cap. We haven't even talk about profitability.
In technology, the average price/sales ratio historically has been about 2X sales, according to Factset research.
https://www.futuriom.com/articles/news/three-reason-why-tech-stocks-may-have-topped/2019/05
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