Bnb is going up and down constantly.. most people are flipping it, buy low sell high. I myself have made a 20% profit, in three days, just doing that. Currently, there is no trading fee so buy it, and if you change your mind, just sell it when the price is slightly higher. Besides, I think the price will definitely go up after 24th August, when the trading fees become applicable and Bnb holders get a 50% discount on that fee. So yeah it's definitely a good time to buy. Try and aim for a price between 0.000058 to 0.00062 btc!