What happens once all 21 Mil Bitcoin are mined? What then?

What happens once all 21 Mil Bitcoin are mined? What then? Where does this graph go?

Stocks normally go up because they are valued in currency such as dollars and since currency loses value things such as inflation the value of the stock increases kind of like goods and homes because the currency is worth less in order to buy the same good of home you need to pay up with more currency than 5 years ago.

However, Bitcoin will eventually become finite, if we ever can supply enough electricity to continue to mine all of it after all halving cycles. I can imagine the cost of mining bitcoin will drive the cost up operation much higher than what its costing today.

Will the value of bitcoin hit a peak or is it supposed to continue to raise, even when no Bitcoin is available to be mined at that point.

https://preview.redd.it/ldqca6vglfnc1.png?1981&format=png&auto=webp&s=ca0fbc4117f8b47f52ea67caebd541c511f19e4d