Mining is done by miners using hardware and application to generate a cryptographic number that is equivalent to or less than a number set from the Bitcoin network's issue algorithm. When selecting which machine to invest in, miners should think about the machine’s profitability and longevity. Easy to implement: https://financefeeds.com/10-best-cryptos-for-passive-income-as-financial-markets-feel-the-heat-after-trump-initiatives/