I read in the paper a month ago, about a family back in 1981, decided to not put their son through Private schooling and rather put that money into BHP shares. Each year they put the price of private school fees into buying more shares. By the the time there son had finished public schooling, the shares were worth just under $1M. He is now funding himself through Uni as an accountant and diversed further into the share market.
Probably not a good idea to put all your money into one company, but makes you wonder...

Mick