Business people choose IDO (Initial Exchange Offering) over ICO (Initial Coin Offering) for several reasons. IDO offers investors a more secure and regulated way to invest in a project. It is also easier for them to access liquidity in the form of tokens, which is not the case with an ICO. An IDO also offers investors more protection from fraudulent activities as the tokens are available through a trusted exchange platform, as opposed to an ICO which is open to anyone. Additionally, IDO projects often offer investors more information and transparency than ICOs, which can help them make informed decisions.