A whole-house filter can be a safer choice, but there are many factors to consider. Most contaminants in water do not enter the body through the skin, so filtering your drinking water is by far the most important option.
Whole house RO systems can cost several thousand dollars to install and they waste a lot of water. Other whole house systems use a charcoal filter system, and some merely soften the water without removing any contaminants at all. You have to do a lot of research if you're considering a whole-house filtration system.
Unless your water leaves stains or dries out your skin and hair (for example, because of too much chlorine), we recommend filtering only your drinking water.