If you want to mine bitcoin, you will need to buy ASIC. This machine is very power and generated higher hash rates. Buy the new ones that produces more hash rates starting from S19 or higher version. You need cheap electricity. The ASIC consume electricity a lot. You will need to calculate the electricity the machine will be consuming before buying it at all. You can not mine bitcoin with GPU not to talk of CPU.

NotFuzzyWarm provided a link, read it to understand more.