I am more concerned about the fact they are almost all custodying with Coinbase. Yikes.
Yes, this could be a problem. I also don't like the idea of putting all our eggs in one basket. This will increase the risk of attacks on Coinbase.
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This is news to me. Can Coinbase use those Bitcoins for other purposes? Or are you concerned about something else entirely?
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No they can't use them for other purposes, at least not legally, but it's a lot of Bitcoin in one highly regulated entity that the government wields a lot of power over.
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