I don't think there are currently many crypto projects that do Initial Public Offering (IPO), very rarely, but IPOs may be able to replace IEO and ICO which are currently experiencing turmoil in its development, I think IPOs can be a new solution in crypto, but according to I IPO does not require many investors, because, IPO is usually done by well-known companies that have enough budget, the purpose is only to promote their tokens/coins in the market, and that is very different from ICO or IEO.