Anyone reflecting over the high valuation of these startups which does not yet make money and that it could be a bubble? Nobody considered the Tulips bulbs man

Anyone reflecting over the high valuation of these startups which does not yet make money and that it could be a bubble? Nobody considered the Tulips bulbs mania in Amsterdam a bubble until after it burst. https://en.wikipedia.org/wiki/Tulip_mania https://en.wikipedia.org/wiki/Tulip_mania