The difference between BCH and other POW forked altcoins compared to BTC lies in whether they are boundless. Only being boundless can form a Ricci flow, only being boundless can create uncertainty, and only being boundless can reach the boundaries of spacetime: time is irreversible. The longest time chain must be boundless, embedded into time to form a Ricci flow, in order to achieve the goal of true peer-to-peer. If it doesn't reach boundlessness, it can't form an irreversible Ricci flow, which means it can't achieve the goal of true peer-to-peer and can be manipulated or tampered with.