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
is it worth to use it to mine BTC?
If yes, how much will I expect to get in 1 month
Not only it is not worth but is impossible to mine bitcoins with a computer. It is impossible to mine with a new computer. To not speak here for a old one.
It's NOT impossible. Even when we were to where it was "impossible" to GPU mine, someone hit TWO blocks with a USB miner. It's basically just the lottery. Claiming it's impossible is naive. Are you likely to? No. But if you feel lucky, go for it.
Were talking very very low odds though. If you just use a old pc and no asics on mining BTC it is going to be just horrible odds. You can use a few old block erupters and be more of a lotto machine.
If you are going to do it get a raspberry PI you will pay it off in electricity savings. And you can run the lotto machine there with a few usb miners. Chances are you will never hit a block... but if you get very lucky not impossible.