I have a computer which will not used, however, it is about 4-5 years old already,
is it worth to use it to mine BTC?
If yes, how much will I expect to get in 1 month
What are the specs of your computer? I'm surpised no one has asked this. If you have a 24 core processor or something ridiculous then maybe it's worth it. Also depends on where you live because electricity bills vary by location.