Crypto vending machines sound amazing but i think we're still a few years away from widespread adoption. The technology is there, fast and cheap transactions with solana, tron, and litecoin but businesses need incentives to implement it. There are also regulatory concerns, potential price volatility and the need for easy to use wallets. It's possible, but for now, i dont see it being more than a niche concept. However, if crypto payments become more common in retail, vending machines could be next!