Many bears are wondering when/if the sell will come, and while it's still unclear we'll re-test the 12/24/18 lows, a retracement to SPX | ES_F 2650-2750 would be healthy in order to continue moving beyond 2018 highs.
Looking at the VXXB chart we can see similarities in price action, and in the RSI, to what we saw October->Dec 2018. If this theory holds, we can expect volatility to increase once VXXB finds support at 26'ish, and launches back into the 30's near Good Friday/Easter.
This theory fails if price drops and holds below 26.