Just because people over 70 won't be going to them, doesn't mean the rest of us won't be. Besides, once I've had cornavirus - which could well be inevitable - I'll no longer be scared for it and will head back out. So will everybody else.
To be honest, the best way to avoid a severe economic impact is to accept you'll most likely get it, and rather than killing businesses by staying inside, just got on with your life, stay fit and healthy, and hope for the best. You're more likely to be killed driving your car, so carry on living!