it is indeed safe but be careful not to corrupt it. Online wallet is also safe but only use the official wallet of the coins, never use 3rd party who offers universal wallet.
Yes, no need to use other peoples wallets better use the only officials that are made especially for crypto holding. When you start investing in crypto you should think in your mind about holding your coin and for this choose your wallet. It is about you that wallet you but I think on crypto-related safety I the only blockchain is the best one that we can trust blindly.