Then you're talking about a setup where a) the counterparty can fail a margin call and b) the exchange it's happening on can get hacked or go bankrupt.
1. I'm not sure what you mean by this. The closest thing to a margin call is an auto-deleveraging. Markets can get messy during periods of mass liquidations but the risk is knowable, and it's in the size of the insurance fund.
2. Counterparty risk exists in every traded market, not just crypto.
It's clear that you and most of the critics here don't even know the basics of market structure, which should cast doubt on your claims. I don't know any other field in which you can provably not know anything about a topic and yet be taken so seriously than in crypto, with both bears _and_ bulls.