I wonder if I'd see it if it were in front of me, or am I too set in my perspective?
I think you would see it now.
Bitcoin is another I missed.
A UK opportunity I played on the edge of was property. I saw a friend paying off the price of buying a flat in 5 years (yes 20% return roughly,) but I only bought 2. Now you get 5% if you are lucky and manage it well. If you are unlucky and get a bad tenant, you are scuppered.
I think everyone is more tuned in to these opportunities, and so they do not last long, and its more difficult to make money on.
There... proved it, I am getting old.