It seems to me that in 2019 we can receive passive income from cryptocurrency. But this is dangerous because the price of a coin can fall. Currently, the use of super-nodes can be profitable. An example of such use is the Sunny King project called VSYS
this year a lot of the development of the masternode project or dividend project, but many also failed to gain the trust of investors and eventually they failed. the average price has decreased sharply due to the large dividends distributed and the absence of interested buyers