I have replied to questions like these before my answer is almost the same as yours. Security and privacy, decentralization and anonymity etc are the things that kept me attach with crypto space. I started to make money from crypto I learned from the crypto space just like you and this knowledge helped me to make some financial decisions like I am some kind of businessman in other words it developed an investor's mindset in me and I started to seek more investment opportunities.
Money is the biggest motivator and interesting factor that attached me to crypto till now and I know in future I will make more money when there are more opportunities nowadays we can earn money from airdrops and we don't know how much so I am giving them a chance too.
There are many considerations that make people choose to invest in crypto, as you said Security and privacy, decentralization and anonymity and many other considerations, and the main factor is to get profit from our investment. This is the main goal of investing in crypto. In the world of crypto, there are many events that allow us to get rewards and also participate in bounty campaigns and airdrops are quite profitable if we can focus there.
I agree with your opinion. When people have a lot of money, they will stop working and choose to invest their money. And investing will be easier for people who have excess money. Moreover, when they invest and experience losses, then they tend to try again and use their failure as a lesson
while for lower middle class people it will be difficult to invest, especially in the crypto world, where our profits are based on how much we invest.