4 billion is still a lot of money even for him.

Also liquid assets for investment are harder for people that rich so still likely a major decision.

Either he used proceeds from last year stock sales or he leveraged some Tesla stock for this .

Can we stop with this fiction. Billionaires can easily liquidate their equity assets and do so regularly.

I am not saying it is a lot of risk for him. I am saying moving that kind of money is a major operation.

Twitter trading volumes are not so high that anyone can just come in make a 4 billion buy order .

Acquiring 10% stock of any public company without upsetting the price to much takes time and effort [1]

It is not some whimsical impluse buy, no matter how much money he has , this was calculated buy he must have considered for a while.

Jack Dorsey stepping down probably helped him to decide to make a move, a hostile founder CEO can make it ugly. Especially somebody like Jack who has another very high value startup and doesn't derive his wealth from just Twitter can make it expensive and ugly if he choose to.

[1]- unless someone is selling you a block trade outside of the market. No institutional investors have left or reduced their stake that much in the last quarter so Elon couldn't have used this route

This incorrect idea that there's any trivial way to make a $4 billion purchase is popular because most people don't understand money in those amounts. It's fine if you have a problem with extreme wealth, but if this is how you think of it, you might not be seeing the actual problems.

$4 billion is a lot of money. Having a lot of money doesn't change the amount of stuff $4billion can buy.