Binance just listed that token because they want the trading fees from users like your friend who are riding the DeFi hype. Not all projects in there are legit and if you want to check how it's performed after the hype - https://coinmarketcap.com/currencies/sushiswap/historical-data/
Binance are enabling the scammers to which is shady behavior from them why do people keep giving their business to shady companies like Binance? They have a monopoly on the exchanges for altcoins but they are corrupt.