$Proshares UltraPro QQQ(TQQQ.US)

I managed to catch this rebound. I decisively switched from QQQ to TQQQ starting from a 2% gain, and now it's almost 10%.

Two days before the rebound, I saw many bloggers giving warnings. One even raised a question that had been bothering me for a long time: TQQQ's rebalancing. Now I'm completely reassured. It turns out many things become clear once you look at them from a different angle.

From this volatility, I learned two things. First, every fluctuation is an opportunity. Second, learn how to buy puts to offset volatility. Third, the 200-day moving average principle is still very useful, but you'll miss the initial rapid surge. This is the part where you can neither avoid nor catch the sharp drops and sharp rises.