ETH gas fees just hit near-zero. Three things just changed forever in crypto. Number one: DeFi is back. Swapping on Uniswap used to cost $40 in gas. Now it's under $0.50. Small wallets can actually play again — that's millions of new users flooding back into liquidity pools. Number two: NFT flipping is profitable again. Gas used to eat your entire margin on sub-$500 NFTs. Now you can flip a $50 NF…