I often read and heard about burning tokens that were not sold when the ICO project was finished, I also knew that by burning the rest of the token was a strategy so the price of the token didn't fall, but if the DEV and the team didn't burn it was a crime? is there a requirement that the remaining unsold tokens must be burned?
Its not a crime if team decide not to burn the remaining unsold tokens in ICO or IEO, this choice is left for the teams to make but with my past experience burning tokens is a very good effective strategy