In this world, unless you live in the wilderness without tools and supplies, everyone depends on others to some degree.
Crypto is an attempt to greedily cut others out and play god. The more plebs you convince of your world view, the more powerful you become.
Meanwhile you do nothing of value for society. Just waste brilliant minds and power.
Many in the world don't have access to a financial system. If they have internet, now they do (assuming they can find some way to onboard). Beyond that, plenty of financial tools only were accessible to the ultra-rich/institutions. Many of those are now accessible to everyone.
May be worth taking a step back to see why brilliant minds are intrigued.
If anyone has access to the internet, they have access to banking services. I mean, there are internet banking services being offered in Burundi and Mozambique, two of the poorest countries in the world.