in my opinion the only threat to bitcoin is only government. wayback 2017 bitcoin is so popular in media but not as a good example of financial asset but a threat to people a big scam or a bubble. government trying to destroy this kind of digital currency
Government can do deeper damage since most people are not yet been involved to this industry way back 2017, it's easier for the government to say something and generalized it to create bad images and scares the people to come and invest.
But, since there's already a lots of exposures with the help of mass Media this kind of stuff ain't hurting anymore, more people got involved now after learning the advantage and potentials coming from this industry.