Even if America will declare to the world that they will legalize and adopt bitcoin to all levels of the society we cannot be sure if other countries who banned bitcoin will also adopt and legalize bitcoin. But the chances are high since America is one of the countries that the world is looking up to in terms of economy and finances. So possibly many of them will accept bitcoin.

More likley USA will see cryptocurrency as securities or some sort of assets than they will see it a real currency. But since they allow even exchanges to operate now on there we can see that they are somewhat looking good at crypto, specially with latest news regarding regulation. However "rich" countries such as USA, China and others are looking for ways to regulate this field because they know if they fall behind whole mess can show up and since you can't stop this thing at least try to regulate some part of it.

I think you need to do some more research. The usage of Bitcoin in China and India is legal. In the United States, it is currently legal in all of their 52 states, although each state has their own policies. Overall, there are around 69 countries or territory where usage of Bitcoin is legal.

   Competition between countries is not only in battlefields. It fights in battlefields and becomes a result. But the main competition is what we call the cold war. The countries are actually fighting, but nobody knows it.
   How is this happening?
   There is always a race to be the best. Russia and America do not fight on battlefields. But it is always a rival to each other. China and America are the same. These examples can be increased.
   Now it seems that countries banned cryptography. But it is not. They are all following secretly. They're making preparations. When any one moves, the others will make their moves.
   Bitcoin is the future of the world. Digital money is now in our lives. This can not be prevented ....

That's a distinct possibility.  One academic and former regulator is pushing for Ethereum and Ripple to be classified as securities, but believes Bitcoin, Litecoin and Monero may potentially escape that classification due to not being launched as ICOs.  Basically, you weren't able to buy BTC/LTC/XMR before those networks were live, whereas ETH and XRP could be purchased as tokens and then redeemed once they launched.  We'll have to wait and see what happens.

technology will always go forward and expand to facilitate human and will always be perfected so this will always develop and will be much better and more organized bitcoin will penetrate the whole world of india and world

You are wrong,the status of bitcoin in those countries are neither legal nor illegal which means we are free to use bitcoin in those countries but the government didn't have any conclusion about this yet.But if a country like USA totally legalize it then other small countries also might follow them but the countries like China and India are big enough countries so they might take their own decisions.

For me, it would definitely help for them to consider legalizing it also but as for the final judgement nobody can really say. But if a superpower is benefiting from it, it's not far off that some countries will follow suit.

Yeah, nobody can really say for now

I don't think it will happen just yet because they all want to preserve their national currencies and have control over money. I do think though each country might digitize their own currencies and use their own blockchain protocols, so they will still own the rights to control the flow of money, unlike with Bitcoin, that is now too decentralized for any one country to govern or control it.