Some say ICO and lending ICO will gain you profit while you sleep , yes its true but there are few of them and still you need to be cautious and vigilant, the risk of investing money is so high .. there's a possibilities that you will end up scam by these Ico.. so better have some research.. if you really want passive income, this is the one that I woulds suggest this is a little bit cossy and should be well maintained. Building mining rig will indeed give you passive income. Just turn your internet and machine on 24/7 and you will gain passive income.
I think it's
everyone's dream. Usually it is called a passive income or income that comes from side jobs. Maybe you can try mining as mentioned above, but you need a lot of capital and must monitor your hardware temperature to be durable and undamaged. You can also
create a website, or youtube channel. But the easiest way is to invest, it's because the investment does not need any effort. You just need to give your money and wait for some time, from there you can get a lot of profit. So I think the
best way to make money while sleeping is to invest. I also do investments myself.