30 years later, most countries on this planet will use bitcoin as an alternative currency and some even use bitcoin as a primary currency. Bitcoin rise will estimate about $10000 - $100000. And many organization will try to knock down bitcoin in many ways in other to bring FIAT back.
Within 30 years of short period i don't think this gonna happen.
Using bitcoin as primary currency seem unrealistic due to high volatility in bitcoin price.
Although it seems 10,000 USD per bitcoin can be achievable within next 30 years.
30 years is really not a long time for a currency to take a place like that in the world, though bitcoin has a great growth potential but it would still face a lot of problems in coming time which may become a hurdle in its way of reaching where you guys are talking about, it may become an alternative currency for some countries but being a primary currency i doubt about.