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.
I can't tell much about 30 years into the future or about what Bitcoin might turn into by that time and whether it will still be alive and kicking at all, but the odds are that the same thing could happen to Bitcoin eventually that had happened to gold in the past. The latter, like Bitcoin, is a limited resource, with the only difference that gold is naturally limited while Bitcoin algorithmically. But this is inconsequential to my point. Which essentially consists in expecting that in not so distant future the price of Bitcoin will be controlled through paper bitcoins, i.e. promises to pay a certain amount of bitcoins without the obligation of actually paying them (e.g. cash-settled Bitcoin futures)...
Just like the price of gold is said to be controlled through paper gold nowadays
Possibilities could happen like that in the future, the price of bitcoin is now increasing meaning people are really trusting it, this should be a continueing process so we can get a good price in the future.
Honestly, it's hard to estimate the actual price because it depends on the demand of the people, and since the users of bitcoin is not that big compared to the worlds population then probably there will be an abrupt increase in the future, I do not know how mass but with massive adaption it would be substantial increase.