In a proverb, speech is silver but what is golden?

I won't say anything...

I prefer silence - especially the silence and whispering of nature.

So what's platinum?

Not much of that wisdom is in practice these days.

please give me heart

Loose lips sink ships

still beck is 'n heel beck. Afrikaans saying meaning to keep quiet stops you from getting into a fist fight. Litterally translated it says quiet mouth is a complete/fixed mouth.

„A fish with its mouth closed never gets caught“