7200 Bitcoins need to be sold on an average day to soak up the liquidity provided by mining and maintain a stable price. In dollars this translates roughly to a little more than $100,000/day. Assuming there are 20,000 true believers, that means each of us on average would need to buy $5 worth of bitcoins every day.
Speculators with no faith will need something to speculate with, so this soaks up some more liquidity and so will others such as traders betting that the price will fall less than the amount they would otherwise have to pay using other payment methods will help. But we can't always depend on them.
Our faith rests on the utility of bitcoin to make the world a better, more prosperous and more free place, based on our understanding of economics. Hard money advocates claim that bitcoin will fail because it's not backed by anything. They are wrong. It's backed by us, the ones who would see bitcoin succeed, even if we personally never make a dime from it. To see our vision come to fruition, we may have to keep a certain amount of bitcoins that we won't sell. ever. I am prepared to do just that. Christians tithe. Bitcoiners hoard.
So are the Christians right? Is the love of money the root of all evil? I guess that depends on what exactly is meant by such a claim. I for one don't love money for it's own sake or for it's ability to gain me power over others, but I do love the freedom it brings to me and to other peaceful folks. Freedom from the necessity the double coincidence of wants. Freedom to specialize according to our abilities. Freedom to do as we individuals, not others, see fit and yet to live without conflict among them.
Maybe our numbers will grow and our burden will be reduced as it is shared by new converts. Maybe in time the utility of Bitcoin will become so obvious that it won't need us anymore at all. Maybe, but until and unless that time comes, we are the keepers of the flame, and I for one will do my part, my ~$150/month. I will do my part to break the iron grip of our bankster overlords. Hell, I was spending almost that much on beer anyway. Maybe redirecting that money into Bitcoin will help me lose that 20 pounds I keep trying to get rid of. I will do my part. If you are able and willing join me. Success isn't guaranteed, but it's gonna be an adventure!