Bitcoin is the world's first digital currency.  I do not believe that any digital currency can be created to compete with Bitcoin.  And Bitcoin has been created with people all over the world in mind.  If America makes their own digital currency, it will be confined to their own country.  If China makes its own currency, it will be confined to the country.  But Bitcoin was not created with a specific race in mind.  Bitcoin has been created with people around the world in mind.  So Bitcoin cannot be compared to any other digital currency.

Each and every country has their own digital currency so the black chain System different from this kind of currency especially with kind had huge number of expectation for a long period of time so I think both the normal digital currency and also cryptocurrency survive in this world for long period of time.

There is no need to worry, this is something many people have been thinking about before governments even warmed up to the possibility, will any government create a decentralized cryptocurrency like bitcoin with an open source code, no backdoors that they cannot print at will and from which they cannot change the rules of the network as they want?

If the answer is no then there is nothing to worry about  since bitcoin will keep being used as it will be superior to that currency and if the answer is yes then there is nothing to worry about either since that coin will just be a bitcoin clone, so bitcoin will survive and even thrive under those conditions.

Pandemic shoud'd driven cryptocurrency tech more useful than it was, but we actually see mostly stock changes rather than progress in frontend technologies for users...

Let's say China makes their own cryptocurrency and opens easy transfers between banks and their local businesses. What will happen to Bitcoin? Nothing because Bitcoin is banned in China anyway so first of all establishing a local cryptocurrency would put them in a position where they have to specifically ban all other cryptocurrencies but their own. In such case their citizens who aren't now using Bitcoin would still be unable to use Bitcoin, which means 0 impact on the market if you ask me.

We have every reason to believe that if big countries were to create their own cryptocurrency, the system using that new digital currency would be no different or would be even worse than the fiat system we have today. That would become a splendid occasion for further adoption of bitcoin. Sane people have already lost trust in government-issued money and switched to the use of bitcoin in their everyday transactions. Some of them have recognized bitcoin as a superior store of value, an effective instrument for protection from crises, recessions, high inflation, and negative interest rates. No way would they give up their bitcoin once again in exchange for pseudo cryptocurrency, which has no advantages whatsoever.

Governments will try to compete with bitcoin and they will fail again, no matter how advanced their blockchain will be.

I doubt it. If they will create such thing then the Banks will be no use and so everything will be decentralized.
Wherein the decentralized one is which the government really hates and the price of it will be really volatile which will really affects the government.
I really don't see for now that some big countries will create their own coin like a Bitcoin.

It takes time before they crate their currency, American can create digital currency and it is only for american people, China can also create a digital currency for Chinese people only, creating their digital currency will not affect bitcoin or any cryptocurrency. At first, most of the people in their country will support that digital currency because it is still new and there are many benefits that they can do but as time goes by they may realize how unique bitcoin is and may regret why they set cryptocurrency away.

We notice that they will use a digital currency but we don't know how it really works. Unlike crypto or blockchain it is borderless transaction and bitcoin has a value that almost reach a thousands of dollars.

So the question is can we buy and trade that electronic currency  and can beat the price of btc? Or it is still 1usd : 6.62 Chinese yuan as a current price from forex.

The issue is, it can be decentralized or centralized. That's why blockchain was created because we don't want monetary control of authority or any third party constitution banks alike.

I think if the countries of the world release their own cryptocurrency it will make bitcoin more popular and increase in price.
Cryptocurrencies issued by countries are no different from fiat currencies, it will be a centralized currency and managed by the central bank. For those reasons the coins issued by countries will not be able to compete with bitcoin.