When you become a Master at trading the market.
It doesn't pay to trade the SPY long and short.
There is no need and you are wasting time.
You make 3X's more money form trading the $UPRO and $SPXU.
Can you tell me why you would prefer to trade $UPRO and $SPXU over the $SPY and $UVXY considering how much less volume and liquidity the previous two have? What makes them a better trade?