Yes this is the oldest scam out there, most likely this is done with cheat engine or editing the page source information. There is no way to hack the coins. They are written in the database how much you have, there is no way to go around that, unless you literally hack their database credentials and manage to get into their database. GL with that, if u can do that you should probably be doing something more useful with your life other than hacking Dekaron just saying
Feel like this really doesnt even need to be said in the first place <_<