Bitcoin is a form of sovereignty. It places you in direct control of your wealth. Some people do use it to gamble, but such people could be considered to be missing the point.
I've never set up online banking, as I feel it carries too much risk. Traditional payment methods are not very secure. I had a conversation with my bank the other day about setting up a separate account with a limited sum of money in it that I could access online, while leaving the rest of my funds securely inaccessible. They told me that if I set up online banking, all of my accounts would be on there. They don't have a way for me to keep only a portion of my savings accessible online. How useless is that?
But with Bitcoin, I can move funds from hotwallets to cold storage as and when I please. The level of security I maintain is entirely my decision.
It is not just a form of freedom for financial stability. Other see it as a cash grab because they invest in it. Both are true in a way because most people who invest on bitcoin see its potential that it might revolutionize the world, although there is still no practical uses of bitcoin, time is slowly leaning towards it. The problem with banks is that they have a vague terms of services and most of their talk is technical jargon that gatekeeps people that wants to try to open an account, there is nothing wrong with opening a bank account, the problem is that they make an invisible wall that prevents people from accessing one.