Is this thread title for me? 
Unfortunately, I don’t have time to elaborate now on what made me go all-in on stocks at the beginning of December. My net worth was still in the negative in the autumn, so the timing of my investments has nothing to do with market movements. Of course, I was very careful about what I was doing, as I’d rather not end up completely penniless again 
The decision to quickly invest everything in stocks was mainly based on the fact that I went through all the bear talk I could find and wasn’t really convinced by the arguments - quite the opposite. Too many positive signs. Of course, prices could crash tomorrow for a reason none of us could have anticipated. In any case, a bigger crash would require some catalyst, which I didn’t try to guess.
I came to the opposite conclusion, though that was over a month ago. My portfolio is specifically tuned for earnings season, so I’m quite confident about the upcoming earnings releases. In February, I’ll review the contents of my portfolio again. I wouldn’t dare invest with any “buy and forget” strategy right now. Companies suitable for that are mostly ridiculously overpriced.
It’s also worth noting that the “longest bull run” continues because the 2018 dip fell 0.2% short of the bear market definition. Would things be somehow different if that dip had been 0.2% deeper?