Bitcoin is currently trading at $100,000, and demand is growing. Will it reach one billion in the next few years? Is this an exaggeration, or is it even possible?
Definitely not within weeks according to your topic title 
.But in the coming few years? why not, as long as we're talking about 10-15 years into the future, the chance is high for this to happen.
If within 5-8 years, it could happen but it needs good narrative. Maybe when bitcoin is being legalized everywhere that investing in bitcoin become normal and any kind of fund can tap into bitcoin.