You could also do some treasure hunting if you have plenty of time, though doing that without some proper equipments would be have. In short, there's no such thing as easy money. You have to do something in order to earn it, in every legal ways. Being a freelancer is the easiest since you can easily manage your own time to finish something, you're the boss.
Don't be too picky about the conditions to get money even though it's also good because it's related to the vision that we run for example but still when you choose too much and don't want too many things in trying to get money then money won't come by itself either.
Currently the situation we already know that with the conditions that occur in an increasingly advanced world and increasingly sophisticated technology we should be aware that money will be increasingly difficult to obtain so as to minimise it then we must be clever in the utilisation of existing resources and a strong desire to achieve the success we want because it is important but if you only want money without any effort at all then of course this is what will make us just stand idle without any results and money will not come in the end either.
If we just stay silent it is impossible to make the money we want, there should be action or effort to get money, because success also requires process and effort, therefore to make the money we want we need action and effort, working with people others as employees or starting their own business which will certainly make money, whatever it is as long as it doesn't harm other people.