The issue right now is that saving money while inflation is plaguing the economy is a bad idea all around. You can invest your money to get a nice return rather than just keeping it in a savings account. It may not even be essential to invest in Bitcoin but rather other types of investments. Money is employed either as an investment in value or as a widely accepted form of payment that holds its value over time. People can earn money, store it, and then spend it later with the knowledge that the value has been maintained through time. As you mentioned, trade led to the invention of money in the 19th century, which was then followed by the influx of gold, silver, and cowries in Africa.