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By the end of 2019, at least $128 million in bitcoin had been paid to ransomware hackers. That's not good optics for a payment system.
Lightning-based fiat-bitcoin systems could popularize crypto payments, as long as fraud and bitcoin's non-reversibility don't get in the way.
Long before crypto, there was digital gold. The boom of the mid-1990s has echoes for today.
Central bank digital currencies may sound like a nice idea, but blogger JP Koning argues they'll remain just that in 2018 – an idea.