Assalam alaikum,
The Prophet, Sallallahu alaihi Wasallam, said: "He is successful who has accepted Islam, who has been provided with sufficient for his wants and been made contented by Allah with what He has given him." [ Sahih Muslim ].

These days when people say so and so is very successful, what they mean is he/she is makning a lot of money. By this Hadith, we come to understand who qualifies to be called successful. It is NOT having car x, house in y and a job z but:- Islam, Fulfilled needs and Possession of a thankful heart.