You keep using that word. I do not think it means what you think it means.[1]

Wantrepreneurs are "wannabe entrepreneurs", in the same sense that wanksters are "wannabe gangsters". Someone is saying you want to be seen as an entrepreneur, but have neither the skills, nor the inclination, to actually build anything. It is an insult. They are calling you a "poser". Entrepreneurs who have yet to succeed, but are trying, are just new or unsuccessful entrepreneurs.

If you are trying to redefine the word, to give it a positive context, I can only wish you luck.

[1] http://www.imdb.com/title/tt0093779/quotes?item=qt0482717