Bitcoin is deflationary...meaniing there's a set limit that can be minted... once that limit is reached...all coins traded will be ones that are already in circulation--meaning there will be presumably higher demand, because of this, some are expecting BTC to go > 25k at some point in the future.
Technically it isn't yet. It is still inflationary for the next 100 years or so. It is currently making less and less over time, but it is in fact still making more than there are now. Eventually it will be deflationary though.