Sorry it was a mistake i am actually referring to the tax that our government is taking from us. I guess it is also the main reason why more countries does not consider bitcoin as a currency because it would hard for them to track those people who does not pay taxes

The biggest win of crypto versus fiat is that crypto is global, fiat is local.
You have dollars, sterling, euro and MANY more fiats that you have in your country and it is really difficult to take it
outside of your country, has a lot of fees. With crypto you need not any forex exchange and you can carry it instantly around the world anywhere you want without any fee and you can send it to anyone around the world without any additional fee.

Not just in a moment, maybe you're know about this, it's already a long time before bitcoin is born, fiat is already become a global payment in the world but fiat having a various form in every country but all of that is still included on the fiat type.

One Bitcoin equeals one Bitcoin no matter what price the illiquid exchanges trade the Bitcoin for. Not many people trade at these exchanges, thats why any suden activity in trade can move the price a lot (up or down). But wait longer periods and average out and the short term price moves from illiquid markets are not big issue anymore - to accomplish this you might buy or sell small sums at regular intervals regardless of price for longer interval, then you get much fairer price from this averaging. But obviously if you dont need to buy or sell, you still holding the same amount of Bitcoins (or percentage of all Bitcoins) no matter what.

I don't know if this thread has been created before, but I would like to know your opinion on Cryptocurrency versus Fiat.

If you could tell me why too. What are the benefit of each? 

Fiat has been lifted by Crypto