How did the Buddha define success?

I read somewhere that Buddha said "Those who fear death have not lived wisely". **What did he meant by "Living Wisely" ?** I sometimes interpret this to mean that I should take a chance, quit my job, and become an entrepreneur. What I want to ask is about mind, should I become hard work in a field according to the interest of my mind or should it does not matter, and keep on doing my work like robot (consciously). Here's my problem: Some say that in order to achieve true success I should do something that interests my mind (so I will not be distracted or bored). If we are talking about spirituality, shouldn't what is interesting to me be less important? That is, should I do things that I find fulfilling so as to achieve my success, or should i just keep working hard at what I am doing now, but with more focus? **The Buddhist goal is Nirvana**, But I have a family and I want to give them a better life, Why earning money is seen as attachment ?