It's very simple. In a bull market hold your coins. In a bear market sell them for usdt.
Those that hodl their coins in 1st half of 2018 got rekt. Those that didn't hodl their coins in 2017 got rekt.
As for me I don't care as much. My rigs are paid off by holding most of my coins i bought in early 2017 and I use my normal day job to pay electric every month. I'm probably in the negative due to this but I'll wait till next bull run in 2 to 3 years before I sell.
Above post is actually a great example of why you should just HODL. I just think he got his first sentence mixed up.
Your mining business plan should take into consideration the electric costs because holding and selling in a BULL market is the way to make decent profits here. I mine, convert to, and hold Bitcoin and Ethereum knowing that a few years from now, the values of these coins will surely rise.