Every crypto can suffer a non programmed supply inflation, by bug or exploit. Bitcoin was exploited in early days, Stellar was exploited in 2017 and that problem will eventually come to Monero one day, maybe it's already here, we don't know, and maybe Bitcoin is actually exploited, we don't know, are you checking every transactions? For reducing the risk, like in Bitcoin, each Monero block contain the Coinbase Transaction where the new xmr created is public: around 0.6 per block (2 minutes) but an exploit is different, I repeat, Bitcoin can be exploited and the exploit will eventually be discovered many months or years later, but honestly, if it will happen only 1 time, this will be a catastrophe. Btc created by exploit will probably be immediately send on exchange, imagine 1 million btc droped out of thin air... I hope it will never happen on any network.