90% in Cold Storage. But Is That the Whole Security Picture?

Cold Storage helps protect crypto assets by reducing online exposure.

But exchange security involves more than one percentage.

On November 12, India's Unocoin reported outgoing transactions from an Ethereum address in its BitGo wallet infrastructure.

The exchange stated that more than 90% of customer crypto was held in Cold Storage. However, it also reported that it did not yet have complete visibility into all potentially unintended wallet transactions.

The investigation is ongoing. The full extent of the activity remains unknown.

What should a robust exchange security approach include?

Reliable wallet activity monitoring

Regular transaction reconciliation

Strong custody and access controls

Clear operational risk limits

Effective incident response

Beginner Takeaway:

Cold Storage protects assets from certain online risks, but it does not replace reliable transaction monitoring and operational controls.

Question: When evaluating an exchange, do you look beyond its Cold Storage percentage?

Source: Unocoin — Official Security Incident Update, November 12, 2026.

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