IOS only? well if any android it will interested
your concept still not interesting, sorry
as we know pokemon-go is not running well for new participants, only people with pokemon interest still using it...
as we learn from pokemon go.. you can not launch aplication with beta tester.. it will make player angry and leave your application...
crypto commonly use as currency, that's why it called cryptocurrency
running around to catch crypto at the street is interesting, but it depend on the prize
btw who is the "demand" at your project to keep the token price high?
is it only from buy elixir from your game or any spesific buyer?