What you are talking about is creating a something like an "invest fund" to place massive buy / sell orders in order to push the marker. It might wirk with coins like BTC or ETH. You will literally make another whale. Maybe it will also make the market more volatile because it won't increase the total volume and liquidity.
But it will never work with low cap coins unless you are trying to act like P&D groups. If you try to group up people for buying / selling such altcoins at the same time then there is a high chance that you will get a lack of liquidity when you need to place a sell order.
At the same time it's near impossible to move the bitcoin and ETH markets because they have so much liquidity. In that lies the skill, you need to know how much you need to move a market but also how much liquidity a market needs for you to then be able to cash out once the price has reached your desired selling point.