Zap does not have the word satoshi or sat in it's name.
IMO there is no reason to combine the two words pico and zap. We don't say zapsat or satzap.
It makes sense to keep the same two word phrasing.
I.e. "zap sats" & "zap pico" as in "zap me some sats", or "zap me some pico."
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