Inter president Massimo Moratti is said to be planning a spending spree as their top four hopes begin to look slim.
But Ranieri says: "We must remain calm and assess everything. There are great champions, we must evaluate all good choices. There are experts who can evaluate all situations."
On playing his best youngsters, Ranieri added: "(Luc) Castaignos, Jonathan and (Ricky) Alvarez are players for Inter, future champions. I'll put them on the field when the team is in a better situation, because the reverse situation may put them in difficulty.
"They train in a fantastic way. When I put them in it is because I am convinced they can do well."