Be aware of downward pressure - every transaction costs now 8$ and that's a low
https://blockchain.info/de/charts/cost-per-transactionhttps://bitcointalk.org/index.php?topic=918068.0Multiply 3600 coins (generated in 24h) with marketprice and you get the daily costs of this nonsense. I think Bitcoin is pretty much a fail and will have make way for more efficient solutions. It's just burning money away for the investor and nothing else.
People don't like to hear it, i know.
At a price of 1000$ the network would burn 3.6 Million USD every day just for mining, that's 1.314 BILLION in a year - so think again. The answer is: in case it reaches 1000$ that will only be for minutes or hours but i doubt we will see even 400$ anytime soon.