Everyone already said you can have multiple addresses on Metamask, I also have 100 addresses on my metamask. You just need to do :
- Open Metamask
- Fill Password
- Click Profile
- Choose +Create Account
- Name your new wallet
- Then, click created
Walla, you already have a new address wallet in a single wallet.
That's true. I am actually referring to have a new seed so that I can generates addresses under this seed conveniently....