Given the current prices you're seeing, you wouldn't even have to be dealing in fractions; 1 CAT is fairly close to fiat values.
+1
Price is going up even if not as fast as difficulty. We're heading to 1btc for 1k cat and in my opinion it will raise more.
Why do i think it will raise more?
1) Fair launch: no premine and many people mining the very first day.
2) Scarcity