Young, healthy people are likely to prioritize buying gasoline and beer over Obamacare insurance plans, the chief executive of major health insurer Aetna said Tuesday.

Mark Bertolini said he would consider re-entering the Obamacare marketplaces, after his company largely left them this year, but not anytime soon. He said that for Aetna to start selling marketplace plans again, Congress would have to give insurers more assistance to bear the costs of sicker patients, which he doesn’t expect to happen before 2019 or 2020.