First of all, if you want to earn more with Dogecoin, you should invest more. Because the value of dogecoin is low and therefore investors do not gain much in the short term. If you invest in this coin with numbers below 1000 units, it may not satisfy you. But it is a constantly increasing coin and I believe it will increase even more in the future. If you enter this business with a money like 2000/3000 $, your earnings will be very high. But you get normal earnings at low amounts. You can buy and sell Dogecoin from all cryptocurrency markets.