if we're citing examples of why "trusted third parties" caused losses to a currencies' users, what about all the crypto currency exchanges that have been robbed

if we're citing examples of why "trusted third parties" caused losses to a currencies' users, what about all the crypto currency exchanges that have been robbed/gone bust etc? There's always that class of risk unless you do things properly without a trusted third party. Unfortunately in the crypto currency space, most of that benefit appears to have been sacrificed in pursuit of the ability to trade faster to make money...