According to current scientific understanding, protons, which are the fundamental particles carrying a positive charge, are considered to be stable. there is no experimental evidence or theoretical framework suggesting that protons can decay into neutrons or any other particles under normal circumstances.
However, it's worth noting that some speculative theories, such as certain grand unified theories or string theories, propose the possibility of proton decay. These theories suggest that protons might have an extremely long but finite lifespan. However, experimental searches for proton decay have not yielded any conclusive evidence to support these theories so far.
In summary, based on our current understanding of particle physics, protons are considered stable and do not decay into neutrons or any other particles.