As of today, others may not see bitcoin that useful but in the future, they'll be able to recognize what it can do to help them. Bitcoin doesn't have to replace fiat when it's been legalized. You know how gold works today? It has a value, it can be an asset but it does not mean gold are being used by children and adult to buy at a store. Bitcoin can work like that, but the difference is that bitcoin is digital.

if bitcoin is legalized directly by the government, that might not mean paper currency (fiat) can no longer sell and buy anymore because fiat money is money issued by the government and also the legacy of our ancestors, but if the government legalized cryptocurrency like bitcoin might make it very easy for many people to transact and shop for people's needs using their electronic technology.

Maybe you are right that technology is very difficult to teach by children, because this transaction is not as easy as using cash. It's also good, imagine letting a child do a transaction without the knowledge of an adult, it's scary. Based on research that children over 5 years are already very interested in gadgets, this is due to their environment. Technology is advancing and I think it only takes time to understand technology, this year people who are left behind in the technology aspect will find it difficult to be successful.

I think it will be more of another mode of payment or money transfers. If the government will legalized bitcoin then it will work like of Paypal wherein you can use it as a payment for goods and services online and if it will be used to pay at a store I guess it will be like bank cards wherein they have terminals that reads the code for bitcoin. However, I think government legalizing bitcoin is a bit impossible now because not all in the government is with bitcoin, I guess majority is against it so may it will happen in the future.

bitcoin will not be equated with fiat I think its uniqueness with high exchange rates also makes bitcoin similar to the value of a diamond ,its use in the future be able to send on a large scale for trade between countries I think this very suitable unique payments through online

how can you say it like that, all will be able to do if socialization is done first, but the right to do socialization for everyone is only the government, now our task is to make the government approve of the existence of bitcoin as a legal currency, so that it can happen ..

That is actually a feature. 2 year olds should not be buying things in a store to begin with...

Legalizing Bitcoin doesn't necessarily mean extinguishing your fiat, you can probably keep using both in parallel. But suppose the fiat is killed entirely, i have an idea that, you can go to a shop/venue/whatever and purchase tokens in a machine with your bitcoins. Think amusement park, but instead of using fiat for the tickets, you use bitcoin. In fact you could buy them in advance and pay the lowest transfer fee, then your little ones could use them just fine in the rides they want to go the actual day.

This can be extended to anything, not just amusement parks...

You could also use some sort of card that could be refilled this way, not unlike what mass transport systems use in many countries. The elderly use those cards in those countries just fine (ie. Hong Kong).

Bitcoin is not volatile, its free. Price fluctuation is a good sign, it means freedom, and don't forget its limited, i will always tend to go up because the other coins are unlimited in supply.

This is just an alternative payment just in case, As you said it would be really difficult for other people to adopt it because it requires Mobile Phone, Internet and bitcoin usage. And yet we do not know what the price of bitcoin will be as it is rising and falling which in turn affects the right price to buy in the stores. The price of bitcoin must be stable before it happens, And I think it's unlikely that it will happen.

Bitcoin is being used as an alternative payment system. Also, it is used by most of the people as a long term investment since the value of bitcoin is volatile so it may rise or fall from time to time. People use bitcoin because they find it more convenient rather than fiat. Because you don't need to bring fiat. All you need to bring is your phone and you can shop and pay online or cashless. Sooner or later bitcoin will use in all payment method and many payment processors will adopt on this. It will well be known in the mainstream.