There has been an extraordinary spurt in tech stocks. Though they have the best growth potential, however they also have very high risk to return ratios. From Amazon.com, Inc to Advanced Micro Devices Inc, Broadcom Inc, Uber Technologies, Inc, Visa Inc, Tesla, Inc (USA), TCS, Infosys (India), Weibo Corp (China), Wisetech Global, Atlassian (Australia), they all live up to the reputation as a tech stock. So my question is on finding a suitable metric only to evaluate tech stocks since there are many ways' of evaluating including Price Earnings Ratio, Internal Rate of Return Method, Free Cash Flow Model, Sales Multiple or a combo of these with something else?.