I think one day we will cure the common cold, however because it is caused by a virus, we need to develop new types of anti-viral drugs. These drugs will also help people with HIV, hepatitis and Influenza. One day we may develop vaccines that will prevent us from getting any of these viruses.
The problem is that it is a very clever thing and keeps changing so we need a cure that kills it dead even if it has changed slightly. I think you’d be the richest person in the world if you came up with a cure!