Hey, I don't know if this is still possible, but I'm sure that it at least used to be because that's how I got money myself.
Basically, I used Cheat Engine to give myself about 2 billion $, and now I wanted to do the same for my friend, however, it's a long time since I've done it for myself, and either I must be doing something wrong, or they patched it. I remember there was some guide on this website on how to use Cheat Engine to give yourself money, I think it had a Cheat Engine Table included, however, I couldn't find that thread, so that's why I'm asking.
What I tried, was finding the value of my friend's bank account, then bought something cheap, checked the new value, and changed it to 2b, however upon changing, it turned back to the original value. There were multiple Addresses that changed to the exact same value after changing the money value, so I tried to change all of them, however, all of them reverted to their original state except one, but that one turned red and it still didn't change anything.
So I would appreciate any help, even if you just tell me that this has been patched, it will be helpful and if it's indeed been patched, I would appreciate any other possible way. I used to the car selling hack, where you modded the car and sold it, but that was too slow for my taste, and then also the bunker hack, which is way better, but I'm not sure if they didn't patch that.