My investment accounts have done well recently too. I’m 100% equities so they looked terrible on Christmas Eve. I stayed the course, made my IRA contribution, added to my taxable account every two weeks, and added to my 401k through the drop. Everything looks good again. My personal net worth is higher than ever now. I know that can change in an instant, so I keep my Spock like calm even when things are going well.
Getting comfortable with volatility, the possibility of seeing your contributions get wiped out in a few days, and patience are key. If you put money in the market and expect to be immediately rewarded with huge increases, you will be disappointed. If you are ok with fluctuations, even big fluctuations, you will be rewarded. The absolute highs of September 2018 will look cheap when the S&P 500 hits 3500, 4000, 5000, or whatever new highs the market has in store for us in the coming years. It might take longer than you want to achieve those numbers, the index might even dip below 2000 again, but I have little doubt we will get there.