with the total supply of Dogecoin, I am sure it will be difficult for the price of Dogecoin to increase by $1, moreover Dogecoin was made just to joke, so in my opinion it is not feasible for the price of Dogecoin to increase by $1 and I personally don't believe that the price of Dogecoin will increase by $1 in the future.
Telling that DOGE can reach $1 is just a trick they use to get people into crypto. If it can reach the $0.20 everyone should be happy. Even before that price whales will dump the price already.
I think Elon musk is the biggest whale who is pumping or manipulating the price of Doge. Since he has a lot of money, he buy cheap doge and then tweet about the doge. The prices rises and he dumps and make easy money. This is how whales play and get hold of our coins. I would not invest in doge even though i know it will be pumped more by these big players.
If you want to make some money with doge just keep an eye on Elon's twitter account. After every tweet of him with the word DOGE in it, the price will go up for at least 10%.