Hi AltasAI, I see from your other post you are halfway through your radiotherapy - bravo! You are getting there.
I'm waiting to start my radiotherapy in the next few weeks. I know it's difficult not to consider 'what if', however the medical staff will be giving you the most appropriate treatment given your diagnosis. You might consider putting that in your profile if you feel comfortable doing so.
What's next is completing your treatment, then over the following weeks recovering from the side affects. You will be asked to carry out a regular PSA test which will be used to track how things are going. I would just focus on what is happening now and the immediate future.
There are other treatments available and are continuing to be developed if needed in the future, but for now my friend I would concentrate on completing your treatment and feeling good again.
Good Luck
Mike