![](https://steemitimages.com/640x0/https://ipfs.io/ipfs/QmQEsgM8P7JMLz1ZYbfoD29gc5s1EpTYvq6ppfJdj4EGQ8)
Digital currencies are generating a lot of excitement. John Oliver enlists Keegan-Michael Key to get potential investors equally excited about the concept of caution.
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