There is a definite supply of bitcoin. Bitcoin will no longer grow when the whole bitcoin mine is over. So there is no fear of inflation here where there is fear of money inflation in every country. So everyone is interested in Bitcoin and everyone is buying Bitcoin as a valuable asset like gold. So Bitcoin is gaining popularity day by day and its value is increasing. that's why bitcoin is valuable
I think you mean devaluation not inflation.
Here is a thought experiment: If there was no published bitcoin price metric - what price would you trade your fiat for it?
If you are starving and I have a basket of apples and you have 1000 bitcoins - what has more value?