Was buying Goldcorp and all that oil and gas stock at their recent low a good idea? I think so. Just look at the increases below.

ARC RESOURCES           +10.30%               
ENCANA                  +96.04%
GOLDCORP                +44.17%
KINDER MORGAN           +11.04%               
ROYAL DUTCH SHELL    +12.03%
SUNCOR ENERGY           +21.67%


Isn't oil and gas being supplanted by renewables?

To a degree, yes, but it is not happening over night, and may not completely happen in my lifetime.