I'm wondering if it's worth exchanging Bitcoin to Monero for security as Bitcoin is quite volatile and monero seems less so. Any advice would be appreciated.
It depends on your decision but if you will take some advice I suggest you to stay with bitcoin if you could, However, as we see monero's volatility is quite good, not almost good, or the best thing to so is to have both, this two is good for long term, especially bitcoin that has greater potential than monero. Therefore that is just an advice it's up to you mate.
Better for him to find more good source if monero will be good for him to be hold since we all know that this coin is on stable and I never see any movement nor huge ATH pump came. But if he want to do an one time exchange for animosity matters then monero will be perfect to be used since the feature is so good.