Initial Coin Offerings (ICOs) are platforms for fundraising in blockchain projects, similar to Initial Public Offerings (IPOs), and are expected to evolve in 2020 with increased regulatory scrutiny and a shift towards security tokens. ICOs raised over $7.5 billion in 2018, with expert predictions for significant growth in the coming year. Key ICOs to watch in 2020 include Facebook's Global Coin, Hedera Hashgraph, and Blockestate, which are anticipated to deliver high returns.