DASH is a good coin among many front runner like the Litecoin, Dogecoin and the Monero. So, buy it more now as it is trading in very low price now. You should keep it in your wallet for the long time say 10 years or more. Definitely you get more than millionth of time in value appreciation.
you can prefer other coins rather than dash. dash is good but not best.
you can buy btc in long term. it is best choice.