Gridlock's standard 3 of 5 guardian setup is perfect for the every day user. It ensures that a hacker cannot access their wallet and steal their crypto.
However, you can increase the number of guardians with Gridlock Pro. You don't sacrifice any usability. You further distribute pieces to reduce the chance of breaches even further. If you have a lot of crypto, you never want to lose your key.
The best way to protect your key is to distribute pieces to more trusted devices. Remember you are the only one who can assemble your key and sign transactions.