Who will then pay? Doctors and hospitals eating all the costs doesn't seem likeky. It is not just the drug, but administering it, treating side effects, monitoring etc.
For experimental treatments, it's very likely. It happens today in many clinical trials.
Yes, as part of trials but for self-selected medication by patients - not sure. The funding sources for trials wouldn't necessarily just extend there.
The organization giving the experimental drugs with the view that it will pay for itself in relevant research and treatments that come from the testing.
But these wouldn't be trials in a useful sense if patients can self-select. The economics might not pan out unless you get to gatekeeping similar to current trials.
And that assumes it would be all bona-fide substance providers.
It could sure speed up a lot of the preclinical work to get to trials. I’m sure the company would love to not have to extrapolate their success probabilities based on mouse studies leading to extensive expensive trials that might not work out in the end.
Doubt it as people would make very uninformed choices, thereby producing mostly worthless data.