The following is strictly my opinion, but my husband and I were ID theft victims back before they made it easy to report/clean up your mess left by the theft. It took me about 6 months and locking down our credit to clean up all the issues (total freeze was free on all credit for 7 years since we were victims). FYI, it was at a car dealership, although they never admitted fault, they had a guy apparently sweep a bunch of loan applications into his bag before quitting and moving away (and selling the info likely).
Lifelock is useless. They even had to settle a lawsuit about their claims of preventing or stopping ID theft "before it happens" or some such nonsense. I had it for years, and they never really did anything. So pay for it if you like the semblance of security, but it's similar to having an alarm sign in your front yard - will deter the casual theft and make you think you're protected, but will do nothing against a pro that is actively trying to steal from you.
The best thing you can do is:
1. Freeze all of your credit so no new accounts can be opened;
2. Monitor your accounts on a weekly (average) basis;
3. Use strong passwords that can't be figured out by anyone, and change them every year minimum, (and use 2-factor authentication if available), and
4. Minimize the way you access your information (don't log in on public wifi to check your accounts for instance, and don't save login name/PW on any device - phone, computer, tablet...) and how often you put it out there (applying for credit means giving someone access to your financial info/SS/work history, so be very vigilant with whomever you do business with about how they handle your information).
I check my accounts daily using Mint. I can see instantly when and where a credit card was used, see the balances in our accounts, check our investments... whatever. If I need to check in depth, I log into my investment accounts after checking in with Mint. We also have alerts on our credit cards - they shoot us an email when it's used someplace like a gas station or for a purchase amount over a certain $ amount.
I don't lose any sleep worrying over the chance that someone might hack my accounts. If that happens, they'll make me whole; it's in their security coverage. Banks have FDIC insurance (up to 250K/account), investment firms have SIPC if the firm fails. Any fraud caught on the cards, and they make it right instantly. As long as I'm doing my part not being careless with my information and monitoring it for any oddities, there's nothing more I can do, so why freak out about it?
The alternative is to be a tin-foil hat crazypants and buying gold bars to bury in the back yard, and frankly I don't think I'd sleep any better going that path, as inflation will definitely steal my money with more certainty than any hacker or thief... and nobody is gonna pay you back for that loss. ;)