is mining using coinhive is good idea?
Personally, I think it's not good idea. If you have website and your users are staying on website for at least few minutes, it can bring some income, additional to profit from advertisements. But you have to set not too high CPU usage to not harm users devices and also, give warning about running miner script. Some antivirus blocking coinhive script and many users may close website immediately after seeing warning. Also, various ad blocking addons blocking coinhive, so, if user using it, you can't benefit from him.
And as user above said, using coinhive to mine Nonero with your PC is big waste of time and electricity.