Why Is Harry Houdini So Dangerous

I think that Harry Houdini did a lot of dangerous things because some people copy his trick so he did harder tricks and he they could not do it. He went inside a milk can and he said people to hold their breath with him 2 minutes pass and they said was he drowning and he went on gasping for breath.He stayed there because he gets money and he does impressive stuff and a lot of people get entertained.And what he did was that he put a lot of needles in his mouth, then he pulled it out and they were tangled up.I know that he is famous because there was an old pocket for sale that had HH it meant Harry Houdini and it costed 8,625 dollars.