If you only have average capital for investment you should not do Bitcoin mining because it requires high capacity mining hardwares that can compete with big mining company, low cost electricity and a lot of time to make a profit from it, it will also cost you big amount of money for regular maintenance and it will take long before you reach the return of investment (ROI). It is recommend that investors with small capital to just buy Bitcoin directly instead of mining it because it is more easier and more profitable, all you need to do is watch the price chart every once in a while.