Well I rember people saying stuff like this about google that fact of the matter is who cares, if youtube died a death tomorrow some people would be affected sure but most would just move to some ware else like dailymotion in a few minutes.
My personal view on the matter is I don't care I use more than one video sight and youtube is getting a little full of it's self since google took it over, so I don't care if youtube is here in 10 years or not.