There are no significant buyers, and not much new money is coming into the bitcoin market
Are you sure?
Hint: Big buyers don't necessarily use exchanges. Yes, I am confident that right now, there is very little buying pressure on exchanges or OTC. If there is buying pressure on OTC, the price rises there, and then OTC buyers will compete and as the price rises, some of them will decide to use exchanges because it will be cheaper there. I would think that OTC transactions probably are generally at lower than exchange price by a small percentage right now. But this could easily switch; since OTC transactions have the benefit of no slippage and high volume, buyers will also decide to pay a premium if demand is high. Yet, if the premium becomes too high, some OTC buyers will switch to exchanges, taking a little more counterparty risk and possible slippage problems, because the lower price benefit will be greater. The result would be higher prices on exchanges. It is possible that OTC coins are going at a slight premium right now, but its not enough to raise the prices on exchanges. To me that means it is not significant.
This is not to say there is not fiat waiting on the sidelines for lower prices. We can even see a lot of evidence of this on the bitfinex's orderbook. Smart money will wait very very patiently for a major capitulation. Any hints that the bear market is not over yet, and they will smartly wait longer.