Realistically there would be fox news blasting propaganda on how much the country is going into debt to fund the madness. "People are going to the doctor for everything now! Back in my days when we fell with our bike we put a plaster on it, we didn't burden the healthcare system with a few scrapes. Our mom gave a kiss on it and we'd be okay. A kid on our block Jimmy broke gis arm once and his mom did surgery on the kitchen table. But now? What do you think putting a plaster on by a doctor costs? 500 dollars. Yes, that's right. It's madness, Trump would have never stood for this, God bless his soul. We had it good under him. Now look. Wars, famine, heat waves, our economy is in shambles! And why? People don't live like they do no more, sad. Do you wish we could go back sometimes? I do. I sit on my front porch and I wonder... what would life be if our great leader would still be here with us. I think we need to all channel our inner Trump tonight. We need it. America needs it. You need it."

realistically that's what's going to happen on fox

Insurance companies would find some way to have record profits. No one spends money more frivolously than the US federal government. Most likely the government would make deals with preexisting medical care providers instead of building out their own national healthcare.

Maybe I could get the therapy and medicine I need.

If we're handwaving the whole transition, nothing too dramatic. It would be more like Canada. People would be healthier and not stressed about the costs of seeing a doctor.

Honestly, a ton of people in the health insurance industry would become unemployed. As well as a lot of hospital/clinic administrators.

A lot of stocks that are held by pensions and mutual funds would become worthless causing chaos in the stock market and destroying peoples retirements.

I would like to point out that the two need not be connected. We could unmarry healthcare and jobs by making it a law that you could cash out your healthcare coverage. This would open the market for more competitive nealthcare administrators as the people using the insurance would be the ones choosing. I think it would also increase the popularity of paying direct for the simpler stuff and only carrying insurance for the big stuff. This I think is an important step as it would realign what medical care actually costs when you take out all the middlemen taking their cut. And then, when you do move to universal healthcare, the prices would be more accurate. Otherwise we are going to end up with nationalize anthem or united healthcare for determining what medical care you get, which will be a nightmare.

Curling the monkey paw a little bit...

A single payer system will likely try to look for some efficiencies since they can track everyone. One thing I expect will happen is that care will shift regarding the homeless population.

A small minority of homeless often rely on hospitals as a shelter of last resort in cases of severe weather. There are also cases where homeless only interface with the emergency care system since it is the only care they can get.

I can easily see a government run system pushing these people into "more cost effective" options, including the immediate movement from emergency rooms into "specialty facilities" for "long term care".