The only reason why we have trusted middleman is because before bitcoin there was no scalable solution to Byzantine generals problem. Now we have it. Whenever t

The only reason why we have trusted middleman is because before bitcoin there was no scalable solution to Byzantine generals problem. Now we have it. Whenever this solution is better than having a central entity appointing middleman is remains to be seen. Blockchains can reduce number of middleman we have to deal with. The open question is at what cost.