I've read suggestions that it's possible for the hashrate to drop so fast that the difficulty doesn't keep up, and the chain freezes. http://bitcoinandtheblock

I've read suggestions that it's possible for the hashrate to drop so fast that the difficulty doesn't keep up, and the chain freezes. http://bitcoinandtheblockchain.blogspot.com/2017/08/chain-death-spiral-fatal-bitcoin.html http://bitcoinandtheblockchain.blogspot.com/2017/08/chain-de... https://cointelegraph.com/news/how-close-did-bitcoin-get-to-disastrous-chain-death-spiral https://cointelegraph.com/news/how-close-did-bitcoin-get-to-...