i am going to continue doing that now too because currently there is no logic anymore and this drop is 100% manipulation and staying away is the best option.
now staying away can mean different things for different people. it may be selling and staying in fiat until shenanigans are over (which may be best for newcomers) or it can mean pulling my bitcoins out of the market and to cold storage until it is over (which is best for those who have been around enough time to know better that these manipulations aren't going to last forever).
Hold yes of course. and buy. I'm gonna buy about $50k of Bitcoin in early 2019 (and might pick up half a bitcoin soon if it keeps dropping under $4k).
This is the absolute worst time to sell, so yeah holding is best, and accumulating more bitcoin.