If Larry has 51% of Nodes and wants to change de 21M hardcap he is free to do so, the other 49% of nodes will remain on the original network with the 21M cap, the miners will remain on the original network. He would be completely alone on his own network with a unique blockchain (the correct term is timechain) completely separated from the original one, with no miners or users transacting.

Even if somehow 80% of nodes/miners decide to increase the 21M and hardfork, i would just ignore and remain on the original network with the rest of the 20%. Fuck them.

Zepasta

bitcoin

ELI5: Hard Forks and 51% Attacks

Pepperoni

Thanks for the response. I understand that. My question is in regards to how consensus is made on a program change. Is it by nodes or people? 

Using your example, Larry wants to change the 21M cap with a hard fork. If he has 51% of nodes and upgrades the program on these nodes, what's to prevent it from happening? I heard that forks were resistant to centralization because this is not how it works and wanted clarity on what unit is being counted in the 51%. 