It is no surprise that anonymity has been leaving bitcoin. Bitcoin is not as anonymous as it used to be.
Monero the more anonymous bitcoin has been getting a lot of news as it is being used for many illegal purposes such as drugs and money laundering.
South Korea today, however, is increasing regulation on all cryptocurrency exchanges as reported by
https://revoltmedia.org/south-korean-new-rules-on-cryptocurrency/.
South Korean laws passed this morning are now only letting South Korean exchanges accept users if the user has real-name bank accounts connected.
Regulations like this are the first of many soon to come that will try to take anonymity from cryptocurrency.
The South Korean government reasoning was to prevent money laundering and other illegal activities.
Bitcoin was never anonymous as such it was just not known to many due to internet issues or lack of education about it . And yes it is way more popular now then it was before which has lead to many illegal works but that's not what the currency says a person to do with it. Instead of using it for betterment people find ways to abuse everything from where they find profit. Money laundering is very common in China and other countries which i think require various rules to make it stop .