Optimism is returning among crypto investors after Tether surpassed the $120 billion mark for the first time — signaling the potential start of a historic “Uptober” rally, as investors are increasingly loading up on stablecoins. Adding to the improving investor sentiment, Ethereum co-founder Vitalik Buterin announced that the blockchain’s upcoming upgrade, “The Verge,” will enable running Ethereum nodes on mobile phones and smartwatches while making the mainnet more accessible and secure. Tether’s USDT hits record $120 billion market cap, flashing “Uptober” signalTether’s United States dollar-…