It irritates me when people talk about "bitcoins", plural. Bitcoin is so divisible that it really seems like more of a "stuff" that can't be pluralized, like sand or water[1].

I forgot where I read it but there was once a description of data that derided the term "datum", singular, to mean one data point. "To anyone who's ever worked with it, data is a _stuff_." Wish I could find the book or article.

[1] Yeah, you can use "sands" or "waters" in a somewhat poetic manner, but that definitely stands out as a special usage.