Janet Yellen pushed for higher taxes on corporations but not on the rich, said the market for a 100-year Treasury bond would be "tiny," and expressed caution about Bitcoin. "A wealth tax has been discussed but is not something President Biden" favors, the Treasury secretary said. The administration is looking to boost the top corporate rate to 28% and a capital-gains tax hike might be something "worth considering." She called Bitcoin "highly speculative," but said central banks should consider issuing sovereign crypto-currencies.