I always keep this in mind. This is why sites such as localbitcoins.com are important. Buy crypto via bank transfer and it can be traced back to you.
I wrote about this topic a while back too. A good example of government trying to adopt cryptocurrencies is the Netherlands. They are experimenting with taxing sales in BTC, for example: the reports they published put forward the idea of forcing apps like Airbnb to integrate tax calculation, so that payments in BTC can be taxed as well. Another example is that they are thinking about hardforking Openbazaar to also tax sales done in cryptocurrency. The next step, I assume, would be the outlawing of the authentic currencies over which the government does not have control over.
You can read my post here: Governments co-opting crypto is bad news for Liberty-Minded people - Looking at Dutch gov. blockchain experiments
Nice video, Graham! No Dtube though?