i have found out that bitcoin forked and cryptograffiti uses "bitcoin cash" which seem less popular than "bitcoin". how many miners bitcoin cash has? how much reliable is this? are messages saved there are now going to be provable to be indeed not changed by 51% attack?
Actually CryptoGraffiti.info now features only the Original BitCoin (BSV). Neither BCH nor BTC follow the specification of BitCoin and are thus airdrop forks from the original. 51% attack is economically unfeasible.