Plain-English definition
A wallet is the keypair that controls an address. The public address is where funds live and can be watched by anyone; the private key is the only thing that can move them.
Because addresses are public, on-chain analysis is possible at all. Because keys are private, the person behind an address is not automatically known, which is the entire challenge of attribution.
Why it matters
Wallet matters because crypto markets can look precise while still being shallow, crowded, or poorly sourced. A useful read is not just the number. It is the number, the size behind it, the context around it, and the part it cannot explain.
Simple example
A simple Wallet example is a reader comparing two venues with the same headline price but different depth. The deeper venue can absorb more capital before the trade, peg, or yield reading starts to move against the user.
How Bathymark uses this term
Bathymark uses Wallet to translate open market data into live liquidity readings. When the term touches a live page, the reading links back to the relevant chain, protocol, stablecoin, DEX, perps, or Signal so the source remains checkable.
Common mistake
The common mistake is treating Wallet as a complete signal by itself. Bathymark treats it as one instrument: useful when read beside liquidity, source, size, and what the number cannot prove.