We already know about bitcoin popularity as an currency the US dollar also is in danger where we can see that bitcoin is better that these real currencies . now need more investor for the increase of crypto currency.

Yeah this is the possible things to happen but not now because dollar influence is so huge even to other countries as well since pairing up with other currencies dollar is the basis. If we will going to compare dollar to cryptocurrency coin then i guess it is the bitcoin. However, we all know that centralized currency does not work like that and it is different from decentralized digital currency like dollars. And yes if we keep buying bitcoin dollar will be less likely fall down its value.

Even though USA is in a lot of the lot of debt, the currency still holds power and is even a desirable one throughout the world.

It is so good to be true,  bitcoin is only just a commodity as of now because the acceptance is not actually wide and embraced some big first world country wants to regulate it so that that they can always handle such amount,  maybe 50 years i guess this would happen but as of now it is really impossible.  However, i also believe that bitcoin is a great investment rather than usd, but it depends on how i handle it.

He is not the first and Will not be the last. It is quiet obvious what to choose if you think with out any prejudices.
Era of dollar is at its decline. It is time for a global crisis. Of course most of countries Will try to keep usd alive, but btc Will rise that time.
And one more Awesome thing about btc, it has deflation, so it is much better as a store of value in longterm

Anything can happen in this modern technology era. Although Bitcoin is getting its popularity all over the world, but it will not collapsed US dollar. In near future bitcoin will be used instead of fiat currency.

I do not think that in the coming years we will see how the dollar depreciates, but I think that in the future, bitcoin really will drive it out

To be honest, I believe that cryptocurrencies will definitely get the space in global fund transfer scene within a decade or two but I don't see cryptocurrencies creating any threat for the traditional fiat currencies. However, debt is a serious issue that might create a threat to the entire global economy, crypto won't be responsible for the incident.

I would strongly recommend everyone to watch this video and think on it with a broader perspective,

* The Biggest Scam In The History Of Mankind - Hidden Secrets of Money Episode 4.

I have no problem on the buy bitcoin part. The rest is just another conspiracy theory. The mighty US dollar will always be the currency of choice. Even for these naysayers. 

It seems to me that whatever problems the dollar may have, it will still remain the main world currency for a long time, even if bitcoin becomes one of the world's leading players.