Being able to set a platinum price as well as a gold price in CS. It will cost more to put up if both prices are put, and you can just have a platinum price/gold price. Yes or no?

A gold to platinum function, let's say 150,000 gold = 1 platinum. It won't starve either parties of what ever they need. This can be increased to 1,000,000 = 1 platinum for all I care, the option just needs to be there. Yes or no? Agree or disagree? Please respond why.

Thanks for reading!

Edit: yes I have thought about the beginning 7 platinum that could be exploited, you will only be able to buy stuff with platinum at a certain level or have 7 platinum be account based.