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 need something extra if you want to store big amount, hardware wallet is good choice or if you don't have a budget for buy hardware wallet, cold wallet is good choice too.
https://bitcoin.org/en/choose-your-wallet