The worst state of any investor is to be at long term loss. It comes with so much anxiety, anger, Fuddity, pressure, spoiled plans and many more ill happenings. But I see it as a time to abandon the old investment and focus on taking advantage of the bear moment seeking for new opportunities because as far as Bitcoin is concern there are new opportunities in every cycle. The beauty of an investment is in its quantity because with much quantity comes so much value.
As we grow and mature and become a experience investor, we have realized that the best time to really make money is to buy when the market is down. It's very different when what we learned though, that during bear market, we shouldn't be buying because the market is uncertain and the it might continue to go down, so that is bad for us.
One of the biggest issues Bitcoin buyers face is that they use money meant to solve an urgent need to invest and end up selling at a loss to meet up with the need. Investment is best done with funds that don't have used in the nearest future, I prefer to call it errand money and because it is an errand money it is not meant to return immediately so errand takes longer time before they get delivered. The beauty of Bitcoin is long term investment. Hodl until it turns green. If it is not green, it isn't ripe for harvest. Each time a red candle appears, it is a signal to look out for buying opportunities.
First, you should invest what you can afford, so that you don't mistakenly selling off when the market is down because you just need money. Second, yeah, hold as long as you can, when the first condition is met, then the best thing is continue to accumulate and be a long term investor and just don't sell for small profits. I know others might be thinking of selling off right now because the market has been green for almost the whole month. But look ahead, the price is still low at $20k'ish, sell when we reach 6 digit or even higher.