Generally yes, buy when it is low. Have a look at some graphs of recent performance to see if this is lower than typical weekly low points
Tesla does have room to expand; the biggest risk is that Musk does something stupid that damages Tesla, he has not done so yet - he seems competent at running (or has given important parts of the job to competent people) Tesla and SpaceX
Safer investment is through exchange traded funds, especially those which track major indexes (also known as index funds). You buy these the same way you buy other stocks - you're buying shares in the fund
It really sucks for nightmares. I heard about someone else with the same thing, they were prescribed sleeping tablets and told to use a sleeping bag if sleeping above ground floor (for fear that the dream might make him jump out of a window
I don't think accidentally hurting oneself is a likely outcome though as these dreams only happen when you're very close to full consciousness on the way to sleep or wakefulness, and they dispel quickly after you start being active
I really wonder about fusion. Most of the news of energy production higher than energy input is about non-electricity fusion - the big tokamak fusion systems are not yet producing more power than they take to run, but scientists working on them are expecting good results soon
Like when I was a kid fusion was 20 years away and would always be 20 years away. Now it looks like it'll be 5 years away for a while
Like when Ukraine was an SSR?