Personal Finance and Security

After reading the topic Home Accounting, or know where your money goes , I decided to put in order the family finances, which are currently kept "in the head".

The first question was whether it would be offline software or an online system. Since it is supposed to keep expenses together, or on different computers (and sometimes from work computers), the online systems win by a huge margin ...

The choice of service also did not take long, because I was already registered with Drebedengi and even started using them somehow.

I discussed with my wife what we would keep records, save and save for “sbychu dreams.” She agreed with everything until she found out that this was an online service. Then she began to say that it was all insecure, that “in case of anything” the intruders could find out how much money we have and, which is not unimportant, where they lie - with a cash at home or in bank accounts.
')
The reason was the fact that a couple of months ago I was “taken away” by the mailbox on Gmail and the six-letter sign, which had this box as primary. I returned the box and the number (thanks to Google), but the “residue remained” :)

And then I wondered how safe it is to store such information? How many of you, dear Habrayuzer, keep records of finances, or store other important personal information online? How safe is it?