A little error there: 1.9 million Dash is not 30% of the total supply (which is most likely around 18.9 million translating into 10%) but of the current supply which is almost 6.5 million at time of this writing.
I'd also like to mention one major and critically important feature that makes Dash future-proof: Dash is a self-funding project that finances its own development, making it fully independent from altruism, donations, foundations etc. and creating a platform to attract talented developers who can work for Dash and get paid for it.
RE: Top 20 Alternatives: Dash (DASH)