In the rapidly developing digital economy, every year there are more and more crypto-currencies and tools associated with them. How to use the opportunities of growing market? How to invest in ICO and how to get to crypto-exchange? Here we present the Complete Guide to ICO. Usually a well-known, stable company with a financial history enters the financial exchange via IPO. ICO is mainly used for crowd-hosting projects, that is, for companies that are just beginning their history. Novice companies can not predict the market's reaction to the fullest. Therefore, the first step for the release of ICO is the pre-announcement of the project.