There are two things here. One is Google secretively going against their Privacy Policy and selling my data/sharing it with other previously undisclosed parties. The other is a data breach in which Google is attacked by some very skilled hackers. If the former ever happens, I'll delete all my data (whatever they allow) from their servers, and leave them forever. For the latter though, I trust them even more than most other companies to protect my data because of their technical know-how and experience. But a data breach is always a possibility with any online company, and that will be my bad luck - so I'm taking a calculated risk here.