BNB rose all the way to the moon becoming the third-largest cryptocurrency by market cap. It's now valued at over $230 per coin, becoming one of the most valuable smart contract platforms in the world after Ethereum. While BNB doesn't come nowhere near close as Ethereum in terms of decentralization, and censorship-resistance, it works great for "De-Fi" with its ultra-low fees and blazing-fast transaction confirmation times.
The answer is Binance Smart Chain.
I'm wondering what could've lead Binance Coin towards new heights within such a short amount of time? Does the "De-Fi" hype have to do anything about this? Do you think BNB's current prices are sustainable or not? Your input will be greatly appreciated. Thanks. 
Yes, it's a combination of factors and I would say that Defi is one of them. But as far as sustainability, it the current state of the market which is very bullish, I think it can still rose to even 4 digits. And I'm sure CZ will continue to tweet with his pet project and will totally focus on it in the next coming months.