It's "clicking a button" in the same way programming is "typing on a keyboard" - people execute trades of different asset classes for a huge variety of reasons

It's "clicking a button" in the same way programming is "typing on a keyboard" - people execute trades of different asset classes for a huge variety of reasons and with different motivations and outcomes. Let's talk fundamentals: if we didn't have an equity/bond market it'd be much much harder for companies to raise money for growth and investment. If we didn't have an IPO market you wouldn't have company exits - the most common forms of company exits are IPO or sale to a listed company. Without exits it wouldn't be economical for VCs to invest in startups. All of these things are interconnected, having liquid public markets play a huge part in economic growth by both directly and indirectly financing the growth-makers.