As long as you have enough buying power to remain liquid off spikes (to do that I would recommend at least 5x the amount invested) then yes, you would "close" to double that investment. Remember it will asymptotically approach $0 in the long run, and when you short your max profit is limited to the price you sold those shares at.
I've laid a much safer and profitable strategy before though. Just go short UVXY and long VXX in equal dollar amounts, rebalancing the first of every month. That way you have a hedge to protect you if UVXY spikes but still retain plenty of downside exposure.
There are plenty of other ways to do this as well. You can park profits in UVXY LEAP puts, etc etc. Refer to my previous posts for exhaustive discussions on this topic.
All with similar returns long term to day trading and much, much less risk. I can show you ways to make 5% monthly using these products in any market condition with very little risk.