What do you see as the biggest thread to BTC?

[traderperspective]

I am not trying to spread any fear, I believe very much in BTC. But I also like to know what potential threads the technology might have, therefore I am asking others about their opinions/facts on the matter.
Personally, I believe in BTC and I am thrilled about the technology. Although, the thread that I currently see is China and the mining industry. If mining is actually shunned, then this will erase the majority of btc miners, and that will cause troubles to the network.
Even though it is in the news these days, this could also just spread some fear short-term and then let btc continue its way, like the time with the exchanges and china.

What do you think are making threads, and what dissolve these?