Although Dash is a scam I don't see it dying a quick death anytime soon as it's setup to prevent it from doing so is ingenious.  In order to be a masternode within the Dash system entitling that node to part of the block reward, the masternode operator must hold 1000 dash.  Currently there are 4335 masternode operators therefore holding a minimum of (lets do the math) 4,335,000 Dash out of a current supply of 7.045 Million dash (Roughly 62%).   45% of the block reward keeps going to these masternode operators, therefore their market-share of the dash network will essentially never go down.  With 62% of the coin supply that will essentially never be sold, it won't die a quick death but instead it will be agonizingly slow as other investors become slowly disenfranchised with the altcoin.  Considering also that 10% of the block reward is reserved to such things as marketing efforts, Dash itself is in a position to pay, buy off, or suppress any negative press.  These marketing efforts will again cause its death to be a slow spiral instead of a quick one.  
Dash will slowly die as investors eventually realize that it's a scam as its only pseudo claim to fame, anonymity, does not exist.  With users haivng to voluntarily opt-in to trust the masternode operators to mix their individual coins its not anonymous as analysis can be done on transactions that have not been voluntarily mixed and maternodes themselves could easily be the ones doing the analysis.  Unless the system acts to trustlessly anonymize all coins/tokens in the system, it is not anonymous.
The concern that I believe Dash should be aware of is Evan Duffield's marketing of Dash as a virtual corporation with different tiers within the corporation.  I've seen numerous presentations where he has touted Dash itself as having hired numerous full time developers, and the masternode operators as being part of the corporation upper level along with miners who are all being paid out from the block rewards.  I think that he is setting himself up to be sued by various governmental agencies such as the US Securities and Exchange Commission whereas he is acting as a de facto CEO.  I can easily see him and any other identifiable individuals associated with Dah taken down for various SEC or other similar government violations.  Once the head of the snake/scam is cut off, its over.