I see Crypto currency is so popular now, The system is growing rapidly and every system is adjusting to it. It is possible to take over in a long time to come.
Will Crypto be the future real money 
Yes I think It will happen. Crypto will be the future real money. I see cryptos have potential to be currency at the coming future.
Since we do not hold cash primarily because we expect it will go up in value; we are pre-disposed to spending cash and not HODLing, because as a unit of value, the amount we hold is the amount of value we expect to receive in exchange, as a result of this premise and it's attendant actions, cash and fiat generally undergo faster throughput in the economy.
Now, in the case of cryptocurrencies, most people who have crypto are saving it because of a belief that it will go up in value, and as a result, there is less throug-put and more volatility, which in turn discourages widespread adoption.
My question is what are the things, technologies, new protocols etc that can make cryptocurrency the preferred option for the exchange of values, on its [cryptocurrency's] road to eventually replacing fiat?