US tech is not the bubble, Or at least the big ones, Alphabet, Apple, Microsoft, Amazon, facebook.
There is a premium to pay but ultimately they all make $$$$$ like mad.
The bubble is in the real economy, and "green energy" thematic etf's. and certainly in some of the smaller companies.
The biggest bubble of all is bonds.
It is a totally different proposition. Do JustEat have a delivery network?
I consider all of those companies as ebay, as in they offer a matchmaker service and take a fee.
They should ALL be profitable very quickly and have high margins.
At the same time you can compete with them VERY easily. So any investments in them IMO, are for the short term based on speculation as ultimately i dont think any of them are profitable long term. and if they are it is on a much smaller scale meaning it should be a loss making long term investment.