Sure it is. "The trend is your friend!" "Don't fight the trend!" SPY is in an uptrend, right? Therefore it is more likely to keep going up than to go down. So go long!
Not related to the thread's topic but I believe AMZN will go to $2000 per share if they announce bankrupcy
I was looking at it a few minutes ago: AMZN market cap : 115Bn (prior to tonight) AMZN Free Cash Flow : 3Bn WMT market cap : 250Bn WMT Free Cash Flow: 15Bn