What does bw mean?

Excuse me, could you possibly enlighten me on the meaning of the acronym "bw"? I've encountered it in a few conversations related to cryptocurrency and finance, but I'm afraid it's a term that's slipped past me. It's quite possible it's a niche term or jargon that's commonly used within the industry, and I'd be grateful if you could provide some context or explanation. Thank you in advance for your assistance.