BTC or not, people have been always greedy since its in our nature, i think that in our current time people are highly connected, so people seeing others how they are living in luxury and have a lot of money and they just want to live like them so they try in any way to get to that state, and i think bitcoin has made it easier for us to tdo so, at least not until recently, because you see how the price changes by a couple of thousands in a matter of hours and making millions from such a change is possible, so that is probably why people have gotten more greedy with bitcoin.
Bitcoin brings a lot of opportunities in life that will make us feel financial independence and so people out from its greediness grasp every opportunity that comes along. But IMO, not all the time that people become greedy, it's just that they are smart enough to invest in a new innovation that has a bright future ahead compared to those traditional one.
There is nothing wrong with bitcoin because it even help us to improve our own economy and even the world economy. The government might have misinterpret bitcoin and think that bitcoin will be the source of all greediness in every person.