Japan's 10-year government bond (JGB) yield climbed to 1.70% on Wednesday, marking its highest level since July 2008. This rise, attributed to expansionary fiscal policies under Abenomics, represents a 13.31 basis point increase over the past week and a 76 basis point rise over the past year. The surge in yields poses a potential challenge for Bitcoin and other risk assets, as analysts warn of possible ripple effects in global bond markets. Goldman Sachs has highlighted the likelihood of rising JGB yields exerting upward pressure on U.S., German, and U.K. bond yields. Concurrently, the Japanese yen has weakened by 3.5% against the dollar, contributing to a stronger dollar index. This currency movement could further constrain the upside potential for Bitcoin and gold, as investors navigate the shifting financial landscape.