Fair question —

For signup, we have three options: get your email from Google, from Coinbase, or use whatever email you want manually. It's up to you whether to use Google/Coinbase or use your own bogus email. The point here is not to gather data about your accounts, but rather just have a way to communicate with you.

For tracking & tax, the hope is that we are providing you as a user with enough value (in the form of portfolio management and tax information) that it is worthwhile for you to track your exchanges/wallets/cryptocurrency on CoinTracker.

We take measures to protect your security: www.cointracker.io/security

If you don't see value in the service, that is useful feedback for us and we'd love to know