It would improve the security of #Bitcoin nodes if they automatically tracked BCH and other SHA256d PoW systems (not necessarily blockchains).
Then the node could have a true sense of the full global mining hashrate (which could be switched to an attack on Bitcoin at any time, even if not currently mining Bitcoin), and adjust its security predictions appropriately.
@duringo it only takes one person to inject the hashes. and truly hidden hashing is exactly what it would detect
Bitcoin Maston Instance