Since I could not vote for giving up photography, I had to vote for, “Give Up Collecting (stick with one camera).”
However, I am a camera user not a camera collector. There is nothing wrong with being a camera collector—I just am not one. For example, I once had to sell two cameras because the collectors had driven the price so high, that I was afraid to use them for fear of devaluing them. I sold them for a profit and bought something I could use.
If I were forced to “stick with one camera,” to prove that I was not a collector, it would not be a rangefinder. I would stick with an SLR with interchangeable lenses (medium format film SLR or digital SLR).
If I were forced to “stick with one camera,” that I already own, it stick with my battery-independent manual/mechanical film SLR.
If I were forced to get rid of all my cameras and forbidden to buy any, rather than give up photography, I would start from scratch and build two large-format pinhole cameras (one with a flat film plane and one with a curved film plane).