You want to receive a monthly profit and earn passively with crypto's. You can't get this by holding but I'd rather hold than to risk it with any type of investment because you might fall to a HYIP that promises percentage of returns.
If you want altcoins, you can invest to masternode coins but that depends on how much your capital.
There is no free pass to anything actually, it is either you learn to work for it, or you simply just hold. Most times a lot of people keep looking for a way to get passive income on their holding, but this means has put them into even more trouble than what they would have probably expected considering the fact that they keep looking for easy way out.
There is no easy way out, the only easy way out is to learn some few activities, such as trading, mining or using some skills as freelance to get something and some times, a lot of people do the lending thing as well, and asides all this, except you are trading, mining or rendering some service, anything that tells you some free stuff out there or some consistent percentage is never going to end well, and in that case, it is even much better to hold.