Many financial strains related to an illness don't just come from medical bills. Being out of work, finding child care, caring for a loved one, transportation, etc are not covered by health insurance.
Critical illnesses such as cancer or heart stroke are long-term illnesses in which expenses will pile up. This is where having critical illness insurance that pays you a fixed-set amount if you're diagnosed with the covered illness will come in handy.
You can use the cash however you like. It's your to use. Coverage amounts of $10,000 to $50,000 available.