That is only partially true. Only very non-controversial changes manage to get through. You can see from the current blocksize debate that it is quite difficult to change the bitcoin protocol.<p>Also majority of hash power doesn&#x27;t decide everything. If miners decide to create cartel where they change the protocol rules (via hard fork), they still need a place where they need to sell those mined coins. So exchanges&#x2F;services&#x2F;merchants should be in the same boat.<p>Also there will be always a lot of competing cryptocurrencies, where users can switch to when needed.