Will Bitcoin lose value when all is mined?

I'm quite curious about the future of Bitcoin. Given that Bitcoin is a finite resource and there will only be 21 million Bitcoins ever mined, I'm wondering if this scarcity will affect its value. Once all Bitcoins are mined, will its value increase as demand continues to grow, or will it lose value as supply dwindles? Will the mining process itself become less profitable as the difficulty increases, and how will this affect the overall economy of Bitcoin? I'm interested in hearing your thoughts on this matter.