I agree as if you starting Holding your bitcoins and don't trade them for goods or services, then with the passage of time it is possible that no one will eventually sell looking for a better price. Crypto traders who are continuously buying and selling bitcoin and other coins, help to maintain this crypto market, it will be true to say that HODLers won't help in increasing market value of a coin.
well true what are some making changes is the one who are buying and selling cause the movement of coin price are dependently on how or what time coin can be sell for or can buy for that is why some coins have the time to make movement on it.