Using the wallet is safer but many kinds of wallets should be selected as the safest wallet to store bitcoin, maybe with the blockchain and xapo it is safe because i use it too.
I don't trust this web wallets to be honest, because this web wallets could be hack by the hackers by any ways do they want, if they will find a single hole on this, they could easily do the hacking, blockchain was hacked way back 2015(correct me if I'm wrong) million of dollars worth of bitcoin was stolen by a hacker, but the hacker was arrested though. My point here is that web wallets are too vulnerable when it comes to hacking, that is why if I were you, I'm going to use hardware wallets like Trezor, the transaction fee is a little bit high per transaction but at least your bitcoin is safe.
Storing bitcoin is about investing your future, that is why store it on something that is more secured than web wallets, let's not think about the price of this wallet because we could use this for a long time, and our bitcoin is safe.
