Vip wants to know if he should wire his home with ethernet cable while he has the walls open. Leo says ABSOLUTELY. And use Cat6 while you're at it to future proof it. Hardwired is always preferable to WiFi and it'll be faster, have far fewer dropouts, and no congestion. Leo just did it himself. We're lifting a lot more data now with WiFi and IoT smart devices. There's a lot of congestion.
If you have a challenging wifi environment and can't afford to wire your home, Leo advises going with a Mesh router: eero, Netgear's Ubiquity, even Asus has gone mesh.
The last option is to use your existing power wires in the house with Powerline Networking. TPLink leads the way with this.