Bond prices and yields move in opposite directions: when investors sell Treasuries, the price falls and the yield rises. The 2-year yield mostly reflects what traders expect from the Federal Reserve, while the 10-year also reflects growth, inflation and the size of US debt.
Treasuries are treated as the lowest-risk investment in dollars, so their yield is the return every riskier asset has to beat. When yields rise, stocks and Bitcoin often come under pressure. This has nothing to do with yield farming in DeFi or with crypto treasury companies.