“Platinum Credit” is a great phrase but I think the .org extension is a poor match for it. .Org is better suited for charities and special groups that have the appearance of being less profit-driven (at least on the surface). Also, the dot com is currently listed for sale.
You say there are 110,410 search for the phrase but I only see 480 monthly exact match searches (only 70 in the US).
Whether you want to simply sell this domain for cash or put effort into developing it, I imagine there are better domains you could hand register that would yield a greater return on your efforts. Since you already own it no harm in asking maybe low $xxx for it from an end user and then dropping the price if you get no bites. If it were mine I would be inclined to take accept anything over what I paid and then investing that in a stronger domain.
IMHO
Best of luck.