Is it lucky to have a rich dad ?

Recently, I read an interesting article and it left me ponder over a while. It narrates a rich man who is working in an investment firm and has been earning hundred of millions for his firm. Much less to say, his annual income can easily amount to a 5 millions. I am sure this figure is going to be an envy from many. He lives in a bungalow situate in a hot district for the wealthy and he has four luxurious car seperately owned by his wife, son, daughter and himself. Just the maintenance fee, insurance and petrol for his son and daughter's car, each can easily reach $3000 per month. His son and daughter are now still in college and yet they are already spending thousands of money per month. Are they going to depend on their dad forever? Are they able to sustain this lifestyle with their job after they graduate? To make it worse, what if their dad loses his job in the investment firm one day? Can his dad's wealth sustain the whole family's lifestyle forever? I am beginning to wonder whether I should feel envy or sad for them.