don't keep your bitcoin in exchanges. it defeats three of the main appeals of bitcoin: autonomy, trustlessness, anonymity
Bitcoin itself isn't anonymous at all: All transactions are public. Only via a Laundry you can cover up your tracks.
Zerocoin and Zcash were created to fix that.
The laundry scheme isn't tied to Bitcoin, that's why I think it's wrong to say that one of Bitcoins advantages is anonimity.
So make a new key, and tumble the Bitcoins until you feel safe again.
EDIT https://news.ycombinator.com/item?id=14918545 This just started getting popular if you want to talk more about tumbling.