American Future Healthcare Act of 2017 This bill amends the Internal Revenue Code, with respect to health savings accounts (HSAs), to: repeal the requirement that an individual making a tax deductible contribution to an HSA be covered by a high deductible health care plan; increase the maximum HSA contribution level; allow Medicare eligible individuals to contribute to an HSA; allow HSAs to be used to purchase health insurance; provide a cost-of-living adjustment for the limits on additional contributions for individuals 55 or older (catch-up contributions); require the cost-of-living adjustments to be indexed to the CPI medical care component (the medical care component for the Consumer Price Index for All Urban Consumers published by the Department of Labor); and allow a rollover of HSA amounts to a Medicare Advantage Medical Savings Account (MSA).