and shorting an inverse (short) equities ETF probably involves more risk than shorting a long ETF, because stocks generally crater faster than the rate at which they can climb
Quote from scot.mcpherson:
There is no real, upper limit to a stock value, yes resistance but not true limit.
Just keep in mind as others have said already using numbers, there is some safety in trading only on the long side. You can only loose what you gambled. On the long side, a stock can only fall to $0.
Betting on the short side of the market, you can loose exponentially more money.