The reason Apple's share price is booming is because "consumers" are buying their products so their earnings were great. Many of them probably spending printed stimulus money. Same for Amazon.
There is really no magic here except the illusion of unlimited money through quantitative easing.
The QE is the only thing holding things together, if that stops, everyone is going down the same drain to poop town.
Edit: I should also mention many investors are probably putting a lot of money into Apple as it's seen as a safe haven for equities right now.