The centralized version is called WBTC [1] and there are several less centralized versions as well, such as renBTC [2].
Once you've wrapped your bitcoin, it opens up a lot more possibilities, such as using it as collateral for loans or providing it as liquidity in DeFi. It brings actual usability to bitcoin beyond just as a store of value (hodl) or payment mechanism. Projects like Badger Finance [3] have been working for over a year now on this area.