UPDATE (28th August 15:00 BST): CoinDesk has reached out to Coinbase for clarification on whether the company's policy excludes bitcoin held in cold storage (offline wallets).
Coinbase has revealed that its users' online wallets are being insured through top broker Aon.
The news came in a surprise blog post in which the company announced it has been insured against the theft or loss of bitcoin since November 2013, stressing that its users are not being charged for the cover.
Aon uses underwriters with high credit ratings, Coinbase explained, such as an Standard & Poor's rating of 'A+' or AM Best rating of 'A XV' or higher.
Protected against theft and hacking
The company said its policy provides sufficient insurance to cover the company's average online holdings at any time and protects against a variety of potential causes of loss:
There is one significant caveat, however:
Coinbase vs the competition
Coinbase went on to warn against claims made by some other companies in the bitcoin industry.
The company pointed out that some bitcoin wallets claim to be fully insured, but in reality are not working with accredited carriers or are self-insuring. Others claim to be fully insured currently, but only because they hold very few bitcoins which can be covered by a small policy. Once the operator grows, the cover would not be adequate, Coinbase said.
Although blog post did not specifically name the bitcoin companies in question, there are relatively few operators offering insured bitcoin services.
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