Thats assets not real cash, his worth on paper is not the same as hard cash that he needs to run businesses.
To turn it into cash he needs to sell stock, but theres a catch, everytime he sells the shares go down, reducing his net worth by billions
Richest person in the world, maybe but its monopoly money, it only exists on paper and is subject to market conditions.
bad business like twitter eat into it, slowly but surely and in this case its 120 million a month and rising.
Advertisers are running scared of twitter, his ad revenue is down a massive 40%, people just don't like Musk, its as simple as that.