I think they’re referring to net present value of future cash is determined by the difference between interest rates and inflation discounted over time. As inflation has gone up so have interest rates. Cash today is worth more in the future, especially if inflation is tamed and you locked in a good interest rate on a long dated bond.
Sort of. The value of companies is (meme stock speculation notwithstanding) the net present value of their future cash flows; for startups that tends to be far into the future cash flows. It's only natural that the price drops when interest rates go up.
But that's due to noncash instruments having higher-than-previously nominal yields. The long-term value of cash is unaffected. (Except to the extent that the higher opportunity cost of holding cash lowers the value of cash.)