Be careful, tokens bought on this platform are hyped and price is growing only first days after exchange listing, after that big corretion happen, when people realized that they pumped a coin which is still in development, in phase of promising. 
And after couple of days of trading, you can see the trend is in downward position. Though Binance can market this easily but still, investing in IEOs is a very high risk investment. You need to be ready for whatever consequences might occur after investing your money. As long as you are in profit, I don't see anything wrong selling early of your tokens.
