όπου ακούς πολλά κεράσια, κράτα μικρό καλάθι

Not inherently. It's a piece of wisdom. However, saying it directly to someone who is making a promise might be seen as a challenge to their honesty.

It's better to use it in spoken business Greek. In an email, it might be too informal. Use 'είμαστε επιφυλακτικοί' instead.

Cherries are seasonal and their quality varies wildly. They were a classic example of a product that was often hyped up by sellers in Greek markets.

There isn't a direct proverbial opposite, but 'έχω μεγάλες προσδοκίες' (I have high expectations) is the literal opposite state.

'Κράτα' is singular (informal/general advice), 'κρατάτε' is plural (formal or addressing a group). Both are correct.

Yes, using the diminutive 'καλαθάκι' adds a bit of irony or humor to the skepticism.

Yes, if someone is described as 'perfect' or 'a genius,' you can use it to suggest they might be more ordinary than described.

Yes, many Greek 'laiko' and folk songs use this imagery to talk about betrayal in love.

No, it's specifically for when the news sounds *too good*.

Yes, it is widely used across the entire Greek-speaking world.

Then you just fill your small basket and go back for more! The proverb is about the *initial* caution.

Often accompanied by a slight shrug or a 'so-so' hand motion (palm down, tilting side to side).

Perfect context! Trailers always show the best parts, so 'κράτα μικρό καλάθι' is very appropriate.

Yes, it's part of the 'old' folk wisdom but remains 100% relevant today.