We talked about security properties of different crypto storage systems.

We observe that it's impossible to define the probability of a specific wallet being hacked. We know that it's possible, but we don't know the probability. Therefore, we can't calculate the security of a specific signature scheme precisely.

However, we know that increasing the heterogeneity of the schema leads to a higher security. For example, using multiple different wallets is more secure than using a single wallet.

Essentially, we're responding to randomness by layering - we're requiring a longer sequence of events to happen before the final bad event.

You can imagine that we're "barricading" our crypto behind multiple layers of protection to make it more resistant against the attacks.