Nothing has changed, people are buying Bitcoin for the sake of making money. They will take risks, - buy, hold, and sell them.
What brings people to invest in Bitcoin is because of its profit potential. People are investing in Bitcoin believing that this would give more wealth to the rich and a better life for the poor. In fact, when someone talks about investing in Bitcoin, many will then say he/she is rich. I don't know where they got that idea but most of us think that all Bitcoin investors have a better future. There is optimism and hope, and that somewhat makes others think why not try this? Ain't no regret form doing this, it is an opportunity and we know it was a good investment.