or you can just start mining and get some bitcoins
Mining is not as easy as you are saying it to be, mining is not possible to be done with just a cpu at home, it needs gpus and other equipments as well like mining hardwares etc, and a lot of electricity, it is really not worth it because you cannot earn much profit out of it.
you are right it will need a lot of electricity so it means mining with GPU will only cost you a lot of money from the necessary mining equipment and to your electricity bill and will only give you a very small profit smaller than the money you've spent from equipment . it couldn't be the best choice .