Does bitcoin have a bid-ask spread?

Could you please elaborate on whether or not Bitcoin transactions typically involve a bid-ask spread? As a cryptocurrency, Bitcoin operates on decentralized exchanges, but does this mean there's no spread between the buying and selling prices? Does the lack of a traditional centralized market affect the presence of a bid-ask spread? Are there any specific factors that influence the potential spread in Bitcoin transactions, such as market liquidity or trading volume? Understanding this aspect is crucial for investors to make informed decisions in the crypto space.