The threat lies in the centralization of the hashrate not in an external force joining the network.
We will have to trust them not to double spend or hold transaction from the mempool (we dont want to trust anyone).
mempool screenshot from now :

The threat lies in the centralization of the hashrate not in an external force joining the network.
We will have to trust them not to double spend or hold transaction from the mempool (we dont want to trust anyone).
mempool screenshot from now :
