BTC is the ticker symbol that exchanges, charts and wallets use for bitcoin; holders read it as naturally as the full word. New gives the name two directions. It can address new people, those buying their first fraction of a coin, or new things: releases, upgrades and headlines. The hyphen separates the two short parts clearly, and the name stays compact at eleven characters including the ending. The .com addresses an international, English-speaking audience.
The domain fits two kinds of projects. On the newcomer side: a guided first-purchase service, a beginner course, a gift product that sets up a wallet for someone new. On the news side: a feed covering network developments, a tracker for node software releases and improvement proposals, or a newsletter for people who want to keep up. A wallet or trading platform could use it as a landing page for new users.