A smaller token often has its deepest and most active market against bitcoin or a stablecoin rather than against dollars. The pairing is a liquidity decision with consequences for how the price moves.
Quote assets are chosen for depth
Every market needs an asset on the other side, and the choice determines who can trade it. A pairing is only useful if participants already hold the quote asset.
Historically bitcoin was the asset everyone in the market held, so listing against it reached the widest audience without requiring anyone to convert into dollars first.
Stablecoins later took over much of that role, offering the same universality with a price that does not move while the trade is being considered.
Banking access shaped the structure
Dollar markets require bank relationships, and those relationships have been uneven for crypto businesses operating in and outside the United States.
A venue without reliable banking cannot hold customer dollars, so it lists everything against crypto assets and lets users bring value in that form.
American traders often see the result indirectly, buying on a regulated dollar venue while price discovery for smaller tokens happens elsewhere in stablecoin markets.
What quoting against bitcoin does to prices
A token priced in bitcoin has two moving parts, and a stable ratio during a falling bitcoin market still means the dollar value fell.
This produces the familiar situation where a token looks flat on one chart and sharply lower on another, with neither chart being wrong.
Traders track both deliberately, because relative strength against bitcoin and absolute change in dollars answer different questions about what happened.
Fragmentation across pairings
The same token may trade against bitcoin, a stablecoin and the dollar simultaneously, each with separate order books and separate depth.
Arbitrage keeps the implied prices close, but only to the extent that participants can move value between venues quickly enough to act.
When transfers slow or a venue restricts withdrawals, the pairings drift apart, and the quoted price becomes venue-specific rather than a market price.
Why the structure is drifting toward stablecoins
Denominating in a stable unit removes one source of noise, which matters for anyone running a business rather than a directional position.
Market makers prefer it too, since quoting a spread in an asset whose own value is jumping requires constantly rehedging the quote currency.
Bitcoin pairings persist mainly where they are historically established or where the counterparty base still holds bitcoin as its working balance.