For me yeah ieos/idos are a good investment but it's also depends on where you put your money. Not all new projects give very big profit. Some of them give good return but how most of the projects show their roi is not true. And now a days investing in good idos are very very hard to get in. But if you get the chance grap itm but first do some research about the project. And one more thing invest all your money in idos or ieos are not a good idea. Now it's upto You.