Like Uber vs existing taxi companies, or Airbnb vs a hotel chain, the decentralized approach is interesting.
But the network effect totally works against you, like many other altcoin projects.
https://en.wikipedia.org/wiki/Metcalfe's_lawSure, this isn't exactly a telecommunications network, but the principle still applies. Bitcoin took off despite the disadvantage of a small starting network, aided by initial users not having to spend a cent, just playing around with the software academically and for fun, ideological vision, or speculation. But, for this, the challenge is particularly bad.
In this case, without a large community of users, you don't just get few real users but probably none in practice.
You can't get the initial critical mass very readily without nearly unlimited startup financing / support, to smash through the network effect's practical barrier to entry, especially compared to alternative established package-delivering corporations.
You would need a megabacker, but I'm not a billionaire, so I can't be it. Spare pocket change in this ICO is not going to be enough.
So that is my reason for not investing.