Let me start off by saying that the Nash team is clearly more established and experienced than both blockport and aphelion. Sure there is risk as the Nash team is doing something no one else in crypto or traditional finance is but they aren’t content with the way things are and want to push the boundaries. Just because current methods “work” doesn’t mean they are secure or efficient. The team has already stated they have some ideas on how to implement better securities methods going forwards but it’ll take time to implement and test which atm is not the top priority.
As far as what you are arguing for you shouldn’t compare Nash operations or marketing to anyone else, least of all the biggest (Binance) or insolvent companies. Nash has confirmed that they have already planned for a burn rate and are secured for at least 2 years without any profits coming in (that’s very good for a project) and it speaks volume that when other projects gambled and held assets, Nash was converting to fiat a week after TGE.
As to address your other argument, mobile will come post official launch of the exchange. You can’t be mobile-centric with an exchange when most people still use the web interfaces to do the majority of trading due to the vast information and complexity needed to TA.
Simple buy/sell and funds management are more catered to mobile-centric interfaces because they can be simplified. Nash understands this and they will focus on mobile hand in hand with their web tools but they’re prioritizing. Be patient and realize that you’re backing a project that has a proprietary use case but make no mistake, Nash will have a huge impact in the coming months/years.