Look to history. Here's a list of "Fortune 7" companies from about 50 years ago.

IBM

AT&T

Exxon

General Motors

General Electric

Eastman Kodak

Sears, Roebuck & Co.

Some of them died. Others are still around but no longer in the top 7. Why is that? Eventually every high-growth company misses a disruptive innovation or makes a key strategic error.