From my experience, and a lot of others, you can do absolutely nothing about it.
If you release it on day 1, day 2 there will be cracked versions ready for download.
One way around this is to give people the game and charge for in game data, which is what Epic did.
In fact, strangely enough, people pirating your game, can be good publicity. There’s a pretty well known article ( which I naturally can’t find now ) about this.
Something I was going to say: Whether you have the PAK encrypted or not doesn’t really matter, it only stops people using your assets, it’s stopping unauthorized people running the code that’s the problem.
That’s basically impossible to solve, and we’ve seen from many many attempts.