In my thought, locking up the coin price in a fixed price will be the same as killing that coins, many people will be leaving that coin behind, because they can't trade that coins to generate profit from that respected coins. It will surely able to be used as a payment tool only.
of course what is done is not locking the coin for a long time. maybe the development team is still preparing for an update or wants to make price stability in advance to attract investors in. all assets will be traded because there is also no fixed price movement in one price.