Today mining is only available to serious business entities, as the period for return on investment has grown upto 10-15 months. But later, you can't keep on making money with the purchased mining equipment, as it almost instantly goes outdated due to the increasing complexity of calculations. Taking into account the risk of price drop for crypto-currencies, equipment failures and other risks, it is no longer possible for an ordinary person to find a niche. Mining is a very competitive, huge bitcoin farms in China are growing at an enormous rate, taking away every opportunity to earn in this area.
However, there is another way to generate profit with cryptocurrency. It's by investing in start-ups. The so-called ICO. The point is that a company issues its own crypto-coins, which are an equivalent to shares or a stock option for the goods that the company will produce. Afterwards everything is simple, if the ICO organizers manage to raise funds, then the company pays dividends to token holders. In addition, the token price usually rises together with the growth of the company's capitalization.