At the end of the day, economics is what drives the world. Profit making, and greed are an integral part of that. Bitcoin would not be as secure without miners and miners would not be here if they did not want to make profit now or have a vision of profit down the line. So, yeah, greed is a big factor.

Same with the nft mania and other shitcoins. They r created with the vision of profit which is based on greed.