I usually play live tournament at The Bike here in So Cal , I met an old friend (in his 60's), I asked him a question if he still see Toto Leonidas play's in big Tournament , he replied , "yah once in a while, hes broke now ".
I remember Toto Leonidas won the 2004 U.S POKER CHAMPIONSIP, he won against Phil Hellmuth heads up at the final table to take the Crown.
And one day what a surprised, Last Sept 9, 2013 , Theres a $ 235 Buy - In at Commerce Casino where I played and he was seating at our table.
He didn't make it to the Final Table and so do I.
I hope hes not broke, but this gives me an idea that If a Propessional Poker Player only plays poker but did not invest his money into business or something eventually he or she will go broke.
The OP was giving us a reality check , its very very hard to depend on playing poker to make a living.