Hmm, interesting topic dude. I just do a trial for a simple math. 1 BTC ~ 6000 USD. Current circulating is around 16 million, so it can be converted into USD: 16.10^6 x 6.10^3 = 96.10^9 (USD 96 billion). This figure is not much referring to the richest man around the world, top 10 rich man around the world such as Jeff Bezos, Bill Gates, Mark Zuckerberg until Larry Ellison collected they have fund around USD 747 billion. So bitcoin just less than 15% of their funds, I can't believe all governments are scared with this bitcoin fund around the world. Better data from Forbes, Bill Gate money will be in similar amount to Bitcoin circulating funds that is around USD 90 billion, check this link: https://www.cbsnews.com/news/forbes-2018-list-of-worlds-billionaires/.
Bitcoin fund are spread around the world, so it is not a big money for a government. Why are governments so busy to take care bitcoins holder money rather than those top rich people?

I prefer to think that some of those top rich people are entering this crypto world and they are making some situation for their own benefit in their business. I think this is more reasonable, to take advantage of the business.