This is how I did it for an older project. I believe I asked the same question and @Silver-Streak was kind enough to help. Basically, if you collide with 2 coins at the same time it will only count as one coin, so you need to count each instance of the coin object. Look at the first line of the event below. The key is the first action with the Count(coin).
Thank you @Lucky-j
Happy new year to you too.

