I think the bear market will hold for long.
Why do you think so, I'm not disputing the fact that it's very much possible for the bear market to last for a while, but if we take a look at the Bitcoin network, it's adoption and the influx of institutional investors into the network in the last one year, then it's prolly safe to say that Bitcoin would probably not stay down for a long time. And then again, manipulation is only temporary on the Bitcoin network, in the long run it becomes ineffective. There will be many more price correction time, and even if I may be wrong, I do not expect Bitcoin to experience a spontaneous and a sustained fall in price
Having said that, the case could prolly be different with other coins, especially those that are easily manipulated by individuals and organizations that own large amount of it, if you're holding such coins, then it's possible it could experience a long bear market, so it's better to take your ROI with such coins when you get it.