You need hardware and a lot of cooling and especially very fast upgrade miners. Because these lose performance very quickly and your efforts can have a negative result.
Holding on to too much paper money can be risky. I'm more into the Web3 side of things—like building secure apps on the blockchain.But I get your point.I wouldn't gamble my life-savings on it
I too, believe banks will one day become obsolete, but not because of cryptocurrency, as it's too unstable, fluctuatuates too much and is essentially just a ponzi scheme for the rich.
I disagree with your claim that banks are a Ponzi scheme for the rich. The real issue is that most people aren't taught how banks work in school, while many wealthy families educate their children about money and financial systems from an early age.