Where did my PokeCoins go?

Excuse me, could you please help me understand what happened to my PokeCoins? I seem to have lost track of them somehow, and I'm a bit concerned. I had a certain amount stored in my digital wallet, but now they're nowhere to be found. Is there a possibility that they were stolen, or could there be some other explanation for their disappearance? I'm hoping you can provide some guidance and help me figure out what's going on.