@gray @kirby because everyone else has it and nearly the entire world economy is hinged on this one extremely narrow aspect of things that even the most profitable company (Apple has a higher profit margin than even Nvidia) needs to shove it down everyone's throats so some 54 year-old working for Morgan Stanley in midtown Manhattan decides to invest more in Apple therefore making the line go up even harder (I say this as markets are having their worst week since the last time Donald Trump did something dumb)
TL;DR short term gains and marketability