If you want to know the future of Obamacare

[where I want to]

look to Medicare.
To get Medicare, taxes specifically directed at that cost had to be paid over a number of years. This would provide the base for funding Part A in the future and promised lifetime benefits after age 65. Part B premiums are raised to fund Part B fully. But it never covered some things and, as technology improved, covered less.
There were reasoble deductibles and coinsurances. Reimbursements were made to providers based on reasonable and customary costs.
Then, although the tax rate was raised on occasion, the program was too expensive so, rather than raise the rates more and offend voters, the deductibles and coinsurances were raised and worse, reimbursements restricted.
Most Medicare people have a pretty expensive private policy to help cover what medicare doesn't. As reimbursements under medicare are more and more restricted, those supplemental policies got more and more expensive.
So the future of Obamacare will be the same, only faster since there is no specific taxing authority. If policies can not be sold to young people, then the Obamacare premiums will go up. I suspect the response will be to regulate the level of reimbusement more and more as Obamacare has turned over that right to the government.
At the same time, the government will find that it can not afford to increase subsidies so people will pay more and more out of their own pockets. And there will be a market for Obamacare supplemental policies.
It's like the Obama promise of "if you like it, you can keep it." You can keep it if you can afford it. Buut there will be no way for a person to shop around to find a policy that best works for them because that market is already gone. It's Obamacare or the toll road.

And if young people doubt the government promise that Medicare will be there for them, how to they feel about Obamacare which has the same promise without specific funding. Just a "it will work if everyone pays in." Only, if you are young, you will have decades of fixing to put up with in Obamacare.
The best choice will probably become to choose the plan that maxs out the subsidy, the access to which is designed to shrink yearly anyway, and shop privately for Obmamacare supplemental policies that can be tailored to individuals.

[Ozarks Tom]

I think you're being too harsh. After all, if you can't trust your government, who can you trust?