We can only imagine how long Bitcoin can be around because it is very difficult to imagine but we can give it a try.
Right now, Bitcoin is only 15 years old after it was invented. In 15 years, Bitcoin has achieved a price gain from a few cents when it started to 107k USD right now. It’s a really big price increase and because Bitcoin is very limited, it is likely to increase in price further.
Bitcoin has achieved for many people to own it, do transactions every day and appreciate it as a store of value, like it is known from Gold currently. Bitcoin is getting more and more accepted as a reliable store of value and it’s very important for Bitcoin to be in a good position to be an attractive store of value.
Many points are in favor of Bitcoin to be a good and reliable store of value even right now and it will get better over time anyways.
Just imagine when Bitcoin is 150 years old, where its price will be and how many people will possess any Bitcoin.
We are still very early!
I think the increase in the value of Bitcoin so far has been very fast, and this is why I think Bitcoin is a very influential revolution in many sectors, I even see Bitcoin being used as one of the campaign support tools (Cmiiw). I consider Bitcoin to be the latest version of gold, or Gold 2.0, and the difference is the limited amount, and it can even be easily sent to all parts of the world quickly.
Regarding what you said about the next 150 years regarding the value of Bitcoin itself, I don't think we need to wait that long, I'm sure in the next 20 or 25 years Bitcoin will be even higher, and I believe at that time Bitcoin will reach $1M or even more, and one of the supporting factors at that time is the increasingly widespread adoption of Bitcoin, both in various institutions or even countries, for example even in my country there is a plan that Bitcoin will become a store of value, even though a few years ago, or a year ago, Bitcoin had not been glanced at or was not yet well known here, but in fact Bitcoin is increasingly mushrooming.