Smart people lose money all the time:
victims of mt gox hack
long term capital management
2000 dotocm crash
Bill ackman's herbalife short.
and and and on
ok bro, I'm not sure we have the same definition of smart people if yours are people decided to buy a bunch of cryptocurrency and keep it all in a website built in php
I go to an economist, or maybe a trader, to learn about money and finances.