mining bitcoin, ETH pos(soon) or a 9 to 5 job
only 9 to 5 job give us steady income because in job our salary is fixed and we are not be able to make more earning unless our job manager ask. But mining bitcoin is a thing on which we get income depend on our work, if we do lot of work then our income will be more and vice versa. ETH need investment and if you have any then it will give you steady income because its price increase uniformly.