Think of yourself as a miner.
You invest $10,000 in a brand new rig.
The next month, the ETH value drops by 50%
What do you do?
You can re sell all your rig for say $7000. You lose $3000.
Or you can still mine and earn some ETH that might be worth much more in the future.
Trading has a short term horizon. Mining has a long term horizon. You cannot buy and sell a rig as fast as buying and selling a bitcoin.
Nice post!
Many thanks
Difficulty increase because there is a bubble, everyone and their mother started to mine with their card. More miners = More hashrate = Difficulty increase. The same reason bitcoin difficulty increased because of asic chips. I know it's quite frustrating, I myself have the same issue with my zcash mining rig.