I want some suggestion to invest in DOGE coin or XRP coin. I personally prefer DOGE coins. But I don't know how strong and active is the Dogecoin community currently? And How is Dogecoin being used in real-world transactions or by businesses?
My second choice is Ripple (XRP). But I want to know more details about it and then take a decision. What are some notable companies or institutions currently using RippleNet and XRP for their operations
Why limit yourself to two, like everyone said, these are arguably the most controversial ones and I would say that you are making a mistake limiting yourself to these two, you should try to avoid this as much as you can. There isn't really anything that you can do to make this work, you should try to achieve something much better about it. I know that you are going to face some issues if you are not careful and I know that it is not going to be simple.
However, if you can "like" something else, and probably a top ranked one, you will be doing much better. That's of course only what you can do, with the way things are going, I would say that it is not going to be easy for anyone, and you are going to see some issues about it as well.