My interpretation of those charts:
1. The people who believe that a bitcoin will be worth a zillion in a few years are not in those charts. They are holding all the bitcoins they have, and whenever they can get or borrow any more money, they immediately buy bitcoins at the current ask price. Since we do not see much of the latter happening, it means that the believers that remain have largely run out of money.
2. The people who have posted offers to sell (the red "ask" mountain at right) are
2a. people who bought bitcoins at 900-1200 USD. They are waiting for the price to return to the same level, so that they can get out without losing money. Many will probably hold their offers at those levels even if the price falls off the bottom, because they would ratehr keep hoping for the impossible rather than admit their mistake. Only very reluctantly they will lower their ask price and accept a loss. On the other hand, if the price ever returns to the 900-1200 range, the smarter ones will sell out and quit.
2b. miners and other people people who bought coins at much lower price, and bet that the price still may get up to the 900-1000 range. They are likely to profit even if they sell well below that, but will try for that level only for greed. They are likely to lower or raise their ask price as the price moves, and will sell as the chances of higher prices seem more remote.
3. Most of the people who have posted offers to buy below the current price (the green "bid" mountain at left) do not believe that the price will get much higher than that. They are assuming that if the current price is (say) 900 USD, then it will probably remain in the 850-950 range for a while. So they offer to buy at (say) 850 and wait for the occasional customer who "must" sell a bunch of bitcoins at any price. Then they immediately post an offer to sell those same bitcoins at (say) 900-950, and wait for the random guy who "must" buy bitcoins at any price. By repeating this move they could make 5% profit on their capital, several times a week. However, this strategy only works if they keep their offers to sell at the front of the "ask" queue. So they will watch the market carefully, and if they see a large number of sellers lowering their ask prices to (say) the 850-950 range, they will immediately lower their bids do buy to 750-850 range.
Thus:
A. The mountain of sell offers asking 900-1200 USD cannot be taken as an indication that the market has faith in bitcoin;
B. The mountain of buy offers which is always 50-100 USD below the current price is not a buffer against a massive drop in ask prices, because it will recede with it.
Does this make sense?