the history of bitcoin was it started in the deepweb, they used it for transactions, no doubt criminals were smart, but i think now that bitcoin is of that much value, rather than using it for bad, they might change their mine, it just like the gold rush, people tend to do thinhs against the law just to get hold of the gold, but in the long run, people changed their ways knowing that the gold they owned is that precious, giving them a sensw of security.