you should understand that in the real banking sector there are money thefts and hacker attacks are ten times higher. much more money is lost there than in the cryptocurrency market
The real theft are in governments and the banking system! But that did not justify the rate of scamming and fraudulent activities that are going on in crypto currency space. $3billion has just been currently moving to mixer service by a Ponzi scheme operator and that was investors money. If it is in the banking system at list bank could report it to governments financial crime bodies, because it is centralized those type of funds can be traced, unlike what is happening in cryptocurrencies' fraud.