With bitcoin you know for a fact, that there will be only 20999999.9769 bitcoins out there (maximum global supply ever), not a single bit more 
I guess it would take only a few minutes to change that condition (at least, there is a possibility of doing just that). You can't do that with gold by any means, no matter what you try, that is, increase the amount of gold by some arbitrary decision...
Even if you get consensus over that
Agree with the above, all it takes is for the devs to change their mind and a few key strokes later its BTC to infinity. Gold was made in the center of a supernova, wont be any time soon that happens again here on earth in a cost effective way.
@ Realbitcoin, what if one or a few of these big BTC holders suddenly decide to cash out their stash, still the top 1% hold the majority of the wealth just like the dreaded fiat, they could easily manipulate the market at will -
BITCOIN TOP-500: 1-50 (https://bitcointalk.org/index.php?topic=321265.0)
1. BTC 980,000*. Satoshi Nakamoto
2. BTC 400,000*. HD Moore (AHA)
3. BTC 400,000*. Dustin D. Trammell (AHA)
4. BTC 400,000*. Tod Beardsley (AHA)
5. BTC 350,000*. "Dread Pirate Roberts" a.k.a. "DPR"
6. BTC 300,000. Roger Ver
7. BTC 300,000*. "knightmb"
8. BTC 200,000. Mark Karpeles
8.5 BTC 182,592. "Loaded"
9. BTC 174,000*. FBI (Federal Bureau of Investigation, USA)
10. BTC 119,000. AsicMiner Management Team of 3 (names?)
11. BTC 110,000. Cameron and Tyler Winklevoss
12. BTC 100,000. "klaus"
13. BTC 100,000. "mezzomix"
14. BTC 75,000. "artforz"
15. BTC 70,000. Erik Voorhees
17. BTC 30,000. "nakowa"
18. BTC 30,000. Mircea Popescu
19. BTC 30,000. "Goat"
20. BTC 25,000. Chamath Palihapitiya
21. BTC 25,000. Gavin Andresen
22. BTC 20,000. Max Keiser
23. BTC 20,000. "Theymos"
First of all the coins by Satoshi are probably lost forever, at this point it's obvious since the coins never moved.
Then DPR will not be making any use of his coins anytime soon.
The FBI tend to sell their coins.
I mean a lot of people there of the big holders don't really own the coins.
Then the Winklevoss will never cash out, they arent dumb and they are here long term, selling would mean shitting on their own backyard.
The rest will probably slowly sell every time we have a bubble. When we reach 1K again, a lot will sell, not dump all of it, but a considerable amount. When we reach 10k, they will sell again... etc etc.. at the end, they will up with no Bitcoins and with fiat only. Then 10 years later BTC goes to 100k-1MM and the fiat currencies collapse, and they cry in regret.