Please don't.
Of course you are right. Nickel salts are carcinogenic. But, so are many chemicals that we all use in our everyday life. I was surprised to learn that even wood dust was a carcinogen. The coins that we handle everyday contain nickel. The outer portion of dimes and quarters are 25% nickel. We ingest nickel in all the food we eat. The gov allows up to 1/10 ppm nickel in bottled water. The most common plated metal is nickel. It is commonly plated from large vats (often, 1000 gallons, or more) of solution containing 1/2 pound of nickel per gallon. People work around these nickel tanks all day long, in a safe manner that is established by gov agencies such as OSHA. All of the chemicals and metals we work with are toxic. Some are carcinogenic. We all need to study the characteristics and dangers of the stuff we work with act accordingly. Even mercury, cadmium, lead, and cyanides are safe if you know what you're doing and treat them with the proper respect.