Forget it, waste of money. The only fairly valid links to cancer are smoking and exposure to radiation. Everything else, the medical profession does not know crap. For example, my Dan had two cancers within five years and the 2nd one killed him in a week. Dan's mother is still alive at 97 and his father lived to be 90, healthy, he was driving up until a few months before he died. Nobody in Dan's immediate family has had cancer, but he had two. Go figure.
The best way to deal with a potential health problem for EVERYONE is to save in a tax-deferred retirement account. In that way, if one has a health problem that they will need to retire earlier than anticipated, they can still get their pension which will be lower and have the 403b to supplement the pension. Relying on health insurance to way too expensive for a disease you might never get, and if a person has a pre-existing disease, the premiums will be high.
Author and Co-Author of two books:
1. Late Bloomer Millionaires: A Financial Story and Investment Guide for the Late Starter (2013)
2. Fighting Powerful Interests: Educators Challenge Tax-sheltered Annuities and WIN! (2015)