That's so impossible if Crypto currency will change cash money, every government has their own currency and Bitcoin/crypto currency does not qualify to be called money. And Bitcoin need fee to make a payment, I think will be better if use fiat money for daily needed, that's like shopping to the market, buying goods, and etc, that's more effective than use bitcoin.
But Bitcoin have another advantages, I like use Bitcoin for investment and transfer money between country, with escrow service that will be make safer.
Between money and Bitcoin have their own position in our life, which can't be done only by 1 currency, either by Bitcoin Or fiat money.

your vision about cryptoworld never happen at least within 500 years next. lol

I dont think it will happen, since it is impossible to replace paper money issued by the government on every country. Government will never let that happen, every country has independent currency. Bitcoin is uncontrollable since it is decentralize, and it cannot be use to pay for non-digital transactions because it is intangible.

We are already pretty close to a cashless financial system. The large majority of people already shifted to a debit and credit card only lifestyle and online payments are mostly done via Payment processors. <PayPal>

Now we introduced a new more sophisticated and innovative technology, called Crypto currencies that takes us even closer to a cashless society.

Many African countries use digital payment technologies on mobile phones, like M-Pesa. Looking at the bigger picture, we are much closer to a cashless financial system, than most people would think. 

I think that it strongly depends on the country you live in by when the cashless form of payment will take over nearly completely.
In some northern European countries that has nearly happened.
They even accept credit cards in churches or have some kind of ATM there, because nobody has cash in the pocket anymore to give as a donation.

I do not think that it will be the privately founded crypto currency that will be the main payment method.
The majority of the people love their fiat, they will not leave it.

I don't even think it will happen at all, it would take a tremendous change for all the money and transactions to become bitcoin and cryptocurrency efficient. It would change the whole system and if that would happen I think it would be change positively.

I started bitcoin before many days when I heard from one of my friend who is already beneficial as a bitcoin businessman. May be it’s from 2016. When I heard I didn’t late for a second and I am getting the fruits of it also.

It happened in 2009 when Bitcoin came to life. Now programmers are thinking in terms of  blockchain. The old world of lazy IT professionals are over.

for me I dont think it will happen, since it is impossible to replace paper money issued by the government on every country. Government will never let that happen, every country has independent currency. Bitcoin is uncontrollable since it is decentralize, and it cannot be use to pay for non-digital transactions because it is intangible.