AMZN was once the biggest company by market cap and over a $1T...
Now it's in the low 900's.
GOOG was once higher than Apple, now it isn't even in the 900's club.
Wall Street is dumb as a rock when it comes to technology and they invest heavily in industries they just don't understand.
My favourite example is cloud.
What is cloud: it's you renting computers.
No, it's not software, because people want a Hotel to go on vacations so they don't have to do the chores associated with living in a house (doing the bedroom, cleaning, etc.) and enjoy. Now, engineers, we want a reason to be hired, so PaaS doesn't have a point, SaaS has it's limited market, and IaaS is completly stupid.
There's a reason why the companies best aligned with doing cloud (those who make semiconductors) aren't aligning in it, is there a Intel cloud? A TSMC cloud? No!
Let them do the computer renting business, "it's the future", renting a thing that devaluates in value faster than a car!