The cheapest coin on Binance can vary as prices fluctuate. As of now, some of the cheapest coins available on Binance may include cryptocurrencies like Dogecoin (DOGE), TRON (TRX), and Stellar Lumens (XLM). However, it's important to note that cryptocurrency prices are constantly changing, so it's recommended to check the current prices on the Binance platform for the most up-to-date information.