Miners were mining when Bitcoin was at $10. Marginal capacity that's barely profitable at $19,000 will disappear at $18,000. As the hashrate decreases at same

Miners were mining when Bitcoin was at $10. Marginal capacity that's barely profitable at $19,000 will disappear at $18,000. As the hashrate decreases at same difficulty level and transaction volume, fees go up which attracts more capacity. The difficulty level adjusts approximately every two weeks, so if mining isn't profitable and blocks aren't created fast enough, difficulty will drop to make mining more profitable. In the last 30 days during the latest bloodbath du jour, hashrate is actually way up from 13 exahashes/second to 17 exahashes/second. https://blockchain.info/charts/hash-rate?timespan=30days https://blockchain.info/charts/hash-rate?timespan=30days