There is no solid ground for Dash. It's just a fork of Bitcoin, so if Bitcoin fails it will too.
Only if the cause of Bitcoin's failure is a piece of code that Dash hasn't altered. Given that Bitcoin is an 18 billion dollar honey pot, we know that it has undergone rigorous battle testing. If it does fail, it will be caused by its complete failure to take decisive action on an essential topic. Dash has a different governance model which does not share the same vulnerabilities.