PS: I'm asking because I again and again read headlines that say something along the line of "everything will be decentralized".
Not everything, crypto supposed to be decentralized but there are many who changes it's purpose. They tend to do it in a way that they will benefit like how those countries implementing their own token to ban other cryptocurrencies. Facebook and youtube will be that way, they will just use token maybe for the sense of having a currency that can be used in their platform but not as decentralized since they knew our infos.