Different concept, centralized, and having unlimited coin supply I think, are enough to say it won't have a chance over Bitcoin. Well, indeed ripple has a large community but  Bitcoin for sure has a larger one. It is centralized, although it is not a negative thing but there is a chance for mafket manipulation which is a downside to some investors. Given that they can create their coin or to continuously supply the market, demand will not be high for sure and that would be a conflict to its price, ofcourse, for the investors. Investors would more likely engage to a more volatile investment because risk is equivalent with profit. Higher risk, higher profit. These, I think is what makes Bitcoin more popular and dominant to this industry.