Is it better to charge wirelessly or by using USC-c cable
Wireless charging
For your battery and your power bill better with usb c, for convenience wirelessly. Edit: The problem for the battery is, that it’s getting hot, since the Power to heat ratio is bad. This does also cause the high power bill. It’s also important for the battery, that you remove your case while charging, and use MagSafe if you use wireless. But in the end you can use just wireless and pay a few bucks for replacing the battery earlier, it depends if it’s worth the convenience for you.
Using usb-c cable