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!