The most common need was that many altcoins would start off with a large premine, and then they would offer an IPO&#x2F;ICO&#x2F;CFC (depending on the time, the term for this would change to be whatever was least likely to get the SEC&#x27;s attention) where they basically put all the coins on an exchange or with an escrow and make it so that people can buy the coins in exchange for bitcoin. If they don&#x27;t sell out of the altcoin&#x27;s supply, then the developers are left with a number of coins. These coins are typically destroyed so that the only supply is owned by people who bought into it.