Coins What's this for?
Ignore it. I did not know that the coins existed for over a month. Did not miss them. Now, I love to meet my daily goals.
Also the coins you collect can be used to repair a 'streak' where you missed a day. So they do have some utility.
I don't look at it either, but it's not nonsense per se. It's all about motivation and tracking your progress. Getting that many coins is one of the indicators of progress and what can keep you going.
Sorry, but at the moment it's not possible to disable the feature.