Excuse my ignorance. But is there truly any way a currency can be completely decentralized? Sure, maybe not central to a governement, but some central entity will always lay claim to any currency. It's further unrealistic to believe each government won't regulate cryptocurrency at some point. I have the same question about dapps and a dectralized internet. Again, I apologize if I'm missing a fundamental factor when asking this question. However, I'm not too proud to ask and be educated.
Bitcoin is a decentralized currency, that means, no one is controlling them nor making them. It is mined and it can be mined by anyone. Satoshi Nakamoto created bitcoin, even if he did, he still mined the bitcoin in order to acquire them.
What will happen if the bitcoin already reached its max supply? that means if the miner already stopped to mine bitcoin. the key is the node of the bitcoin. but regarding from the latest problem if the bitcoin it's not fully decentralized as you said that because there is a lot of the debate for the blocksize increase and you can see through the result of the consensus.