I see it go up and down every day so I'm confused!
Traders are using it to trade and as long as they engage DOGE in such activities, you should know that it will definitely be fluctuation. It is either you join traders in trading the coin or you just move on to another coin that is very good for future investment.
There is no coin is available in the market without fluctuation, even bitcoin. As bitcoin not been going up and down too from the moment it started its bull run? The best you can do is just to learn to trade, so that you can follow the league too by buying when the price is dip which you call low, and sell when the price is high, but the coins you can rely on now to continue increasing even when there are fluctuations are bitcoin and the top 10 coins on coinmarketcap.