Pure speculation. Customers are converting btc into bch which is why this huge fluctuation. Those who converted any coin will know this. Very difficult to judge the price of conversion. It's also can be seen as a blind conversion without actually looking at the price per conversation.

The second reason is those who invested onto btc expecting fork is slowly moving out to altcoins. But that speculation happening because of rumors bch cross 3000 and btc will come to that range.

Same in the case of mining too. A lot of hash power moved out from btc mining yo bch. Almost 300 % increase happened. This makes each block saved in 3 min and expecting hash rate increase in the next 30 hrs. So huge difficulty change can happen.

Today was a major difficulty decrease in btc mining. This makes btc mining more profitable for next 14 days.

By having btc.com pool with US servers having an option to switch btc and bch pools instantly.

We advised our customers to move from Europe servers to the USA to make this easy process. So they can switch pools at pool levels without contacting the machines. Being in Iceland reaching USA and Europe servers is almost same latency. So advice to our customers to use USA servers if btc.com pool is used.