Do you mean "can play a musical instrument" as in "knows how to" or "has the potential to"? Obviously not everyone knows how, especially if they don't own one. But I think basically anyone has the potential. Screwing around with an instrument helps you figure out if if it's a halfway decent fit, and with the Internet it's pretty easy to learn enough of the basics to figure out if it's right for you.
Do you mean "can play a musical instrument" as in "knows how to" or "has the potential to"? Obviously not everyone knows how, especially if they don't own one. But I think basically anyone has the potential. Screwing around with an instrument helps you figure out if if it's a halfway decent fit, and with the Internet it's pretty easy to learn enough of the basics to figure out if it's right for you.