etc.
Let's assemble.
Title: "米国と日本、15年ぶりに円支援で介入、暗号資産市場は緊張"
But original title has "Crypto Markets on Edge" - "on edge" means tense, so "緊張" or "警戒感". I'll use "警戒感" to be more precise.
Alternatively: "米国と日本、15年ぶりに円を支援するため介入、暗号資産市場は警戒感"
But we need to keep the title as a single sentence. I'll go with: "米国と日本、15年ぶりに円支援で介入、暗号資産市場は警戒感"
But "円支援で介入" is a bit awkward. Better: "円支援のための介入" but we have comma. Let's do: "米国と日本
