I don't even remember the last time i refilled mobile credit using the local currency here 
Same thing here, I even made a small business of it just using my local wallet/exchange here that refill mobile credits also can pay monthly bills.How I cryptography? How I cryptocurrency? Which one is it, because neither makes any sense.
Probably he's regarding the currency since its the used and common terms than crypto which is Cryptography. People should have to see the difference between the subreddit r/crypto and r/cryptocurrency