We have a sickness fund in Germany and it is reasonable compared to the US. You don't go bankrupt over a medical crisis.
If the system isn't fixed, you will feel the costs in increased premiums. The public hospitals are not allowed to turn away those uninsured patients. The taxpayer foots the bill.
The costs of care and insurance rise.
If the ACA is destroyed, the people will not put up with it. The same way they stopped Republicans from repealing it.
Trump failed to deliver on his promise of replacing the ACA with his everyone will be insured line and medicare for all.