Short answer: 60% of all DASH is stored in masternodes which generate an 8.5 DASH per month dividend for their owners. Most of these masternode owners are long-term holders who really enjoy getting paid a 9% annual ROI for doing nothing but running a node.
More people want to buy DASH, but these masternode owners are not being enticed to sell their holdings, meaning you have more buyers competing for very few sellers. As the price rises, maybe owners of DASH will be enticed to sell their holdings. Considering that many of us think DASH is worth way more than $70 each, it could take awhile...
There is a small problem - all master node owners won't be able to redeem their Dash. Because if they try to do this, the price will dump to the bottom.
What about all holders of Apple stock? Could they all redeem their stock at the same time? If they tried to do that, would the price dump to the bottom?
Is AAPL worth less because you can't sell the entire marketcap all at once?
You won't believe it, but yes they can. Anyone who has spare 500 billions can buy Apple as a whole by paying every holder their value.
Apple is a company, it gets profits, it has capital, it has trademark, it has cash on their accounts. What does Dash have of all of that? It just rises because of that ponzi scheme with master nodes. When a master node gets a good real value (equivalent to a house, for example), people will start selling them and a dump will happen. People won't wait for too long. It would be smart to turn your master node to a house while you can.