You save money because you value future consumption over present consumption. That's time preference, and it drives everything in a capitalist economy. When you delay gratification, you create the capital that builds tomorrow's wealth.
Under a sound money system, banks take your savings and lend them to entrepreneurs who build factories, develop software, and train workers. This transforms your sacrifice into productive capacity. The interest rate coordinates this whole dance between savers and investors; high rates reward patience, low rates signal "spend now."
Modern banking, led by the Fed, destroys this mechanism when it prints money and suppresses rates to zero. Suddenly, everyone gets the signal to consume immediately, while savers get punished for their restraint. You end up with a consumption economy built on debt instead of a production economy built on savings. No wonder everything feels backward these days.