2017 boomed with numerous ICOs and many people lost their money. IEO came after and provided a better investment security and overall reliability. However, it still was a risky tool. This led to a Support Listing Coin (SLC) emersion that becomes popular every day.
Support Listing Coin (SLC) is a kind of secondary token offer that takes place on a certain cryptocurrency exchange. It includes a new security feature that makes the investments safe.