I'm still very confused about Bitcoin. Now, I opened a wallet from blockchain, ok? And you know, I have the identifier, pass, mnemonic info and etc...
Do I need to something extra? I mean, isn't this enough? Why people are using other wallets?
You should absolutely set up 2-factor if you're using an online wallet, preferably to your cell phone. Make sure to safely back up your wallet regularly too but don't forget the mnemonic or make sure you've written it down properly in the first place.