None, unless somebody (China?) surprises us a with a working one specifically on the bitcoin blockchain. Quantum resistance blockchain architecture is in the w

None, unless somebody (China?) surprises us a with a working one specifically on the bitcoin blockchain. Quantum resistance blockchain architecture is in the works or even available in theory and if the danger is real Bitcoin can be forked/modified to be quantum resistant. Because community would most probably be okay with this switch it would be accepted world wide.