Too Long; Didn't Read
An STO (which stands for “Security Token Offering”) is a method of raising funds in a way similar to an ICO. Unlike the latter an STO is legally compliant with all regulations, making token issuers responsible for all their actions. The first STOs were offered in 2017, and five of them raised over $65.59 million in that year alone. The following year was a lot more successful; 35 STOs collected $434.95 million. Last year was nearly the same; $452.54 million for 55 new projects.