Can crowdsourcing pick the best stocks or do they just tell you the most popular?
It would be interesting to see some research on this?

Some people find crowdsourcing very useful for getting their search results as an example. Just because many people like something, does it make it right or good? Is there wisdom of crowds?

Is it better to know a few/ many experts in a field and get their advice? Is their knowledge worth more than the crowds?

Would it be better to find experts around the world and monitor their portfolios to determine investment strategies?

Here are a bunch of sites I am tagging to explore this:
http://www.bankinnovation.net/profiles/blogs/crowd-sourcing-in-wealth
http://covestor.com/
http://alphaclone.com/how_we_can_help.html
https://www.quovo.com/splash.php
http://www.activetradingpartners.com/
http://www.piqqem.com/