if you really need a lot of funds then you need to do ICO/IEO but if you can get your own investors to fund the project that you are developing now then there is no need to do ICO/IEO
It doesn't, there are various ways that can be taken to promote his project if he is wanna starting a new project. They is he must have a lot of skill to develop a product and i just wanna try to read the WP that has already published by OP above you.