Too bad for that bank client as he learned how investing in cryptocurrency works in a hard way. No one is to blame aside from himself because if only he took the time to learn everything about Bitcoin and cryptocurrency and the less risky way to spend his hard-earned money, he won't suffer from being scammed. Most often, greediness doesn't really bring good things if you are just new in investing, you need to take initiative to learn everything before engaging yourself on anything that involves money.