For the kind of data privacy breaches Facebook is famous for, it is time that WhatsApp users use this opportunity to migrate to another platform. If you are lost as to which platform to migrate to, then perhaps you may wish to consider https://keybase.io.
As for privacy on Keybase, here is an extract from their Privacy On Keybase page, which should be enough to convince you to migrate to Keybase:
The gist is that Keybase won't sell or rent your data or content for any reason. Again, we can't even access it. And, we'll never rely on ads for revenue. Eventually, we may charge for special features for larger corporations. But individual and existing accounts will always be free.
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