I guess the simplest explanation with that is more people wanting to buy bitcoin there's possible more pump to happen.
And also if there's more people buying Bitcoin in the world then for sure that fix supply of Bitcoin cannot cope up on world demands. This will contribute for possible huge price growth that will happen on Bitcoin in future.
Scarcity is already showing and we could see it base on the accumulation announce by institution for example MicroStrategy and other more. Demands is rising day by day and with this we can expect there's something good will happen on Bitcoin due to those situations happened.
That's true.
The total supply of Bitcoin is very well known, not only now in 2025 but also many years ago since 2009. Scarcity is important but not enough if people don't have other reasons that convince them investing in Bitcoin and actually purchasing it.
Price does not rise by scarcity but by increasing demand and whenever the market is lack of demand of new investors and their new capital inflow, price will be stagnant and even falling.
Altcoins can skyrocket too if their teams can create hype successfully and convince people to join, get high demand from altcoin enthusiasts. However, altcoins are fundamentally bad and they can not maintain demand, consequently trading volume and price plummet with time.