Get rid of all the cash?
Probably sometime, but this is still a long way ... of course, this is not only our (user) goal  but also (probably even much more) governments, because cash still remains the most difficult way payment to track down...
However I think needs very long time and saying that I do not think about years but rather about decades ...

no,
it means getting rid of PAPER cash. thus everything is electronic and locked in custodian(banks) managed by the same financial industry.
banks and governments wont give up control.
just look at how they treat exchanges. you can google it and find LOADS of examples where exchanges KYC and report users. and some who go over certain thresholds are told that a service(withdrawal) cant be offered unless KYC/extra data is provided as required by a higher threshold.

something not needed when storing and handling PAPER cash.

what will change is the lack of need of a walk-in bank branch. and instead payments and exchanges can b done online or via ATMS.
banks save on alot of physical costs:
less rents/transport/maintenance

banks save on staffing costs:
less security personnel, auditors, IT staff, cleaners, supervisees

but in the end average joe who just about knows hw to use a debit card would not notice much difference in spending experience wither its old fiat on card or new bank managed crypto

I'm not a blockchain developer but I would say that its highly unlikely that we can get rid of cash just like that. Remember that banking institutions are one of the pillars of a country, so getting rid of them would somewhat collapse any nation, in my opinion. I'm sure there are advanced countries experimenting on being a cashless society but it doesn't mean that other nations will follow and make cash obsolete.

It is always easy to convince people that changes are coming fast but actually what is happening on the ground can be different. The massive adoption for cryptocurrency is still to come and this can't happen within just years or even just a decade...as we are actually dealing here with real people and not machines that can be easily program. There are many places in this world where cash is always the prime way of exchange so I guess we should be looking at the accelerate use of non-cash based transactions but not expect that cash can totally be eliminated. When credit cards became so popular in the 80s and 90s people were predicting that we are going to become the cashless society...well credit and debit cards are so popular today but so does fiat money. I am then seeing a world where people can have many choices they can opt according to different situations and locations.

Getting rid of cash - Yes it is an imminent future!

Decentralized Cryptos to replace cash - Daydreaming!

When you say, getting rid of cash, what do you exactly mean? The way digital economy is moving forward, I am sure Banks and governments will start issuing digital currencies very soon! But those digital currencies will be strictly the digital form of the existing fiat currencies and certainly not bitcoin or any other cryptos. So we will probably see Digital Dollars and Digital Euros circulating in the market. But we won't see NEO/bitcoin to replace them! These are two different thing!

I think that is a discussion that will have a positive effect on the crypto world. but the negative impact of this plan is for some primitive people. they will be difficult to adapt to a decentralized system. so. in my opinion classic transactions must also be maintained to serve primitive people.

No government is planning on getting rid of cash, nor is that a practical suggestion at the time.
A global currency would emerge and grow slowly over the next century not at an instant.
Both fiat and bitcoin can coexist for a while together as financial tools.

Completely? Nope it wont happen till the end of this world. At least it wont happen globally, perhaps some countries may burn all their paper cash and change it with digital money in the future but it wont apply for all countries in this world. Regulation and economical condition are some of the reasons why it wont happen globally.

If you mean completely getting rid of cash and adopting digital currency, it's a great development yet I don't think it'll be as easy as it is since not everyone are that good when it comes to technology. And it will be also hard to replace traditional currency since most people were already used to this type of currency.
The government will probably be strict when applying digital currency and it might be hard for bitcoin since of course, the government wants it to be centralized.

Even though am not a developer but I am a crypto user and lover. I believe one day the world will be united with cryptocurrency but this won't mean the traditional financial institutions won't function again. Its just going to die down slowly as the worldwide adoption of crptocurrency increases. Financial institutions might are already bothered now about cryptocurrency which is why many don't want it to survive because they know its going to change things and they will be forced to make changes in the trending direction which will be difficult for them.