Moore's law is really about economics.
No physical quantity can continue to change exponentially forever. Your job is delaying forever.
It is extremely unlikely that anyone coming out of school with a technical degree will go into one area and stay there. Today's students have to look forward to the excitement of probably having three or four careers.
Most of what I learned as an entrepreneur was by trial and error.
If everything you try works, you aren't trying hard enough.
If you'd asked me in 1980 what the big impact of microprocessors would be, I probably would have missed the PC. If you asked me in 1990 what was important, I probably would have missed the Internet.