Unless something catastrophic happens with BTC (such as extremely high transaction fee), the chances of a spike in the BCH exchange rates are quite low. Also, BCH has been weakened by the BSV hard fork, with a significant proportion of the BCH users moving to the forked coin. Initiatives such as the Schnorr signatures are quite advanced, in technical terms. But it needs to be seen how they can convince the BTC users to shift to BCH.