Interesting research coming out of Uni of Cambridge. Can bitcoins be tracked? ... used to have issues with tainting the bitcoins but current technology has lead to practical ways to trace stolen bitcoins. im not sure what this means for you and me, like what happens if somehow stolen bitcoins land in my hands... but interesting nonetheless.
Video: Stolen Bitcoin Tracing - Computerphile; practical way to trace stolen bitcoins It is looking interesting if some one lost their bitcoin to due stolen and it will traced and we can be recovered that it will be good so i waiting for that technology to launch its will be help for more peoples who loss there money.