I'm a Millennial.
This market volatility is expected. It wasn't a matter of if but when it would happen. With that background, yes, 100% stocks. To be honest, I check my portfolio maybe 3 times a year, and just auto-dump cash into it every month. I don't watch the daily news, so my only clue that there was even a drop is from co-workers' remarks and forums.
I don't speak for all millennials, but a 100% stocks strategy is long term investment. It could be down for the next 10 years. Doesn't really matter, that was understood before I got into the game. One of my very favorite parts of this investment strategy is that I don't need to know or care about daily, weekly, or even yearly swings. So I will continue doing what I have been since the beginning of this plan: nothing! No "buying extra stocks on sale" because that's timing the market too. Just monthly contributions until I retire (ideally early).
If I were to time the market... this is the time to be in 100% stocks anyway. Market correction during my prime earning years? Yes please (assuming I don't get laid off).