yes... By selling it.
For example on coinbase, kraken, localbitcoins, this forum,...

Here is an (incomplete) list of places where you can trade BTC, do be carefull: not all of them are trusted, not all of them convert BTC to your local FIAT, not all of them give the same conversion rate...
https://www.coingecko.com/en/coins/bitcoin/trading_exchanges#panel