we do not share your data with anyone and there are many ways to control the visibility and storage life of your data here.
but the internet is a public space and you should always assume your data could be compromised.
be smart with your password, use tor or a vpn, and use pgp for sensitive communications.
I've lost coins both of these ways! Can't say what the best is but losing the wallet password was the worst since the person I wanted to strangle was well within reach.→