Saving money in the bank only favor a particular class of person in the society
I no think say e get any class of people in the society wey saving money in the bank dey favor, the rich do not save money in the bank, because dey know say e no go fit give them enough ROI, and if the poor decide to keep their money in the bank, then dey are not doing themselves any favor. If you wan make good use of your money, you have to invest it; bank na for small money wey you wan spend short term.
The banks of the country are enticing clients to deposit money. One of the objectives of this is to increase the reserves of the banks and in return, provide limited profits after a specified period of time and that amount is very limited. If an investor is tempted to save Bitcoin within that period, he can get higher profits than the bank. Saving Bitcoin is a separate independent financial system without any third party intervention through a decentralized banking system.
You are right that the rich class does not keep money in the bank, they earn money through investments. If the poor focus on saving Bitcoin with their limited money, they can reach a decent level.