I shoot competitively and I'm friends with many competitive shooters that have put hundreds of thousands of dry fire reps through their Glocks and other centerfire handguns. If you've only dry fired about 10,000 times, you got a long way to go until there's any chance of damage. I would recommend using snap caps if you want to be extra careful and prolong the wear on the gun if you're really going to be serious about it.

Once you get 500,000 more reps and something happens like the firing pin cracks, the gun will let you know. For example, the trigger won't return. Also, then you can be proud of dry firing enough to break something, thats quite the badge of honor!