Placing secure after wallet gives the name the feel of a status indicator, as if a dashboard were reporting that everything is in order. BTC keeps the focus on bitcoin and wallet names the object, so the name tells customers exactly what problem it addresses. The vocabulary is basic English that non-native speakers understand at once. The .com ending suits a service offered online to customers in many countries and time zones.
Within the Wallet & Storage bundle, this name covers the security service side of a custody brand. Projects that fit include a review service that checks how individuals and small firms store their keys, a guided setup service for new hardware wallets, a security checklist app with periodic reminders, and a course on recognising phishing, fake apps and social engineering attacks.