When you compare it with FIAT, then it is better in every feature! Crypto is digital, you can send it overseas in few seconds, the transaction is not reversible, so it makes it trustworthy. No one is able to cheat in the system and creating free money. It is decentralized and transparent, this would help it to expand globally. Plus the limited supply makes it rare and valuable 
You made some valid points but I won't entirely agree with you on "crypto is bettter than FIAT in every feature". Crypto still lags in some areas, sometimes network clog cause delay in transactions for BTC and also high fees like what we experience recently with ETH transactions. In future, FIAT will still be used, no two ways about it but we hope crypto mainstream adoption comes. Both FIAT and crypto have their pros and cons.