SF/SV/NYC/LON are very desirable areas and it takes a long time to build out that infrastructure. It is a supply/demand mismatch. Domains were these nebulous things no one understood but if you bought one, it was worth way more than you paid for it. However, JET.com and Genius.com were quite expensive because they are pretty desirable domains, nerdy.com just went for 25K. Supply has gone up so the localpetstores.co.com domains aren'rt really worth anything.
On balance, technology companies-- companies that are leveraging technology well and constantly improve as part of their business, will continue to do well. However, if you define technology as, with a computer then that sector is as descriptive as American or European. Companies in leveraging technology well:
Alphabet
Apple
FB (oculus)
Amazon
Intel
Companies often referred to as "technology companies"
IBM
GE
If you look at the highlevel descriptors, both baskets are fairly comparable, and that is the trap!.
Amazon has a globally unified distribution for digital media, technology applications, physical things, and a marketplace.
Alphabet.
Facebook has 1Billion users and owns much of the messaging. It is how people organize social search. They also are able to marry the phone messaging and image/moments, with the online community of the computer and soon bridge the devide to gaming and a truly addictive world of VR.
Intel is the world leader in building the thing every one of those companies runs on.
etc.
The mismatch between value and perceived value is becoming more evident. So it is, to quote our guy Charlie D, both the best of times and rthe worst of times, some have much infront of them and some have nothing, and the pundits will insist that it is a superlative of this or that, when in reality it is sameness: think hard, be more correct and capitalize on your view of the future.
edit: just to clarify, I plan on using the domain lest anyone think I am a squatter. Although, I do have a tendency to get sidetracked/change gears so I was using that as an analogy above.