Dogecoin is a favourite coin for me, and in my view this coin is also a good investment in 2020, maybe there are still many coins on the market that are much better than Doge, but it wouldn't hurt if you made this coin as a portfolio investment. In terms of Dogecoin transactions are far more cost-effective and I'm sure Dogecoin's price could increase in the coming year.
Dogecoin is just a normal altcoin and does not have much value in investing, so if you choose to invest, you need to consider carefully before making a decision. For me, this coin is not suitable for long-term investment because the value of this coin is often very volatile so there are many risks that you need to avoid. Of course, you are the decision maker so it will depend a lot on how you think about that coin.