Some really good advice on this thread, especially for newer miners. The point I would like to reiterate is that you should absolutely no be selling coins now with the market down. This is the mistake that so many people make, and it actually feeds the negative fuel and causes further declines that are not driven be any actual negative events (such as more exchange hacks, gov meddling, etc). If people would just chill out and HODL, the drops would not be as big and everyone would be happier. I made this mistake early on myself. Been mining almost 2 years now and it probably took me a good 8-9 months before I came to this realization.
Now yes, some may not have a choice due to financial crisis, etc, but aside from that, now is actually the time to be buying, not selling. just look at every other dip prior to this in the last 2 years and you will see it followed by a major comeback to new all-time highs for most coins. Granted, this current downswing has lasted longer than some had thought, but that certainly doesn't mean there is not a huge bull market right around the corner.
Personally, my game-plan of late as been to hold a bit of USDT when the market is shaky, then pull the trigger on some coins I've been eyeing that have a likely bright near-term future. Then, when it looks like the market is near a bottom, i buy up those coins and wait for the rise. This was not an easy thing to do because I think many of us fear that what if the market continues tanking even further. But at least recent history has shown otherwise and this methodology has worked well for me for the past 3-4 dips.
Less than half the time in but agree completely with the tether strategy, used it myself today.