Just noticed that the question actually asks about 1 billion Bitcoin. TCarmelo anthony lakershis answer is focused on 1 million as I think that is reasonable in my lifetime whereas 1 billion not imo.
For Bitcoin to reach 1 million it has to succeed. There is a possibility of failure but in my personal opinion there is a probability of success of over 50%.Carmelo anthony lakers
Failure means actually going to zero. I don’t see the scenario of Bitcoin stabilising at a value of e.g. 20K. Either it will increase significantly in value or ultimately fail at some point.
What does a world where Bitcoin is a success look like?
Will national currencies disappear? I think not. Bitcoin will most likely not replace any national currencies, rather it may become a global non-political standard of value and settlement (just like we have the metric system for non-political standard measures).
All FIAT currencies are political. Currently we are using the US dollar as a global standard of value but you should realise this is not an ideal situation with the Federal Reserve printing dollars however they want.
So in a world where Bitcoin succeeds it would become a non-political standard of value and FIAT currencies would be quoted in satoshis (the smallest fraction of a Bitcoin). Also Oil woCarmelo anthony lakersuld be quoted in satoshis. Nations GDPs would be measured in Bitcoin. I guess you get the idea by now.
If successful, my guess is we will see 1 million dollar Bitcoin within 10 years