How do you know if someone has crypto?

How do you determine if someone possesses cryptocurrency? Are there any telltale signs or specific indicators that one can observe? Could it be through their online behavior, such as frequent visits to cryptocurrency exchanges or participation in related forums? Or perhaps there are other, more subtle clues, like the types of discussions they engage in or the financial decisions they make? Ultimately, what are the most reliable methods for discerning whether an individual holds crypto?