Although there is also a .onl gTLD, and it is kind of understandable what is the supposed meaning of this abbrevitation, I feel onl / credit has limited value, it can be kind of brandable for low XXX, maybe 1.5k, in best case, in 2018. The domain has around 70/year standard renewal for .credit, and I do not feel this is going to be profitable investment.
The reason is that probability of resale for above price is pretty low, as there are many alternatives in new gTLD space for end users who can to use them for their online credit business. Would the domain be online / credit, I would see it as at least 50x - 100x more valuable.