Because literally in banking system for example, if you have $5000 that will be the value in 3 to 5 months and will add a little interest in it so my question is- I don't fully know how bitcoin works. Is it the same way with the banking system? Will I get more value or less value in future times?
Even you get little interest from your saving account, but if you calculate with the inflation rate, I believe the inflation rate is higher than your interest. In the next year your will earn $20 interest from your $5,000, so it would be $5,020. But the value of your $5,020 isn't same like $5,000, it might already become $4,970. So it's mean you're lose the value.
Bitcoin doesn't work like that because Bitcoin isn't Proof Of Stake, it's Proof Of Work where there's a maximum supply. The price is determined from demand and supply.