Everybody is happy, BTC is skyrocketing and many dreams are becoming true, it feels so good, looking in the skeptics eyes, telling the magical 3 words: I Told You, right?

But I'm getting a bit nervous as well:
Isn't it too much of a technical burden for Bitcoin, maintaining such a mission ever increasingly critical network?

I'm afraid it is, at the time of this writing, each Bitcoin block is switching hundreds of millions of dollars, being happy and proud does not change the fact that as much as bitcoin surges, so does incentives for adversarial behavior, hence risks?

How do you think? What are the risks involved?