I disagree, and actually name the mechanism that will operate to prevent that extinction: decentralization. Just as threats will materialize from that source, so will security mechanisms that are more than competent to effectively prevent our demise. It is why I advocate continually for adoption of those decentralized means of production that make the best sense for each of us in our individual circumstances, and myself have done so.
Even if it's only Steem, all reading my words have taken a first step towards decentralization of power and wealth. Many more equally powerful mechanisms await our adoption. Time is of the essence, and those tardy out the gate will pay prices I cannot imagine.