That's how much he believes in bitcoin as a sure long-term investment that will return him a good return. I think he has 189,150 bitcoin holdings at the moment and will increase.
Let's assume that the total amount of bitcoin that he holds could be 200,000 bitcoins. In real-life applications, what I'm saying is just an example. Try to imagine if he sells Bitcoin for only 200k, which I don't think is 100k. His target price is to actually sell the Bitcoin, but let's just close it at 100k$ out of 200k total Bitcoins at 19B dollars, the total that will come back to him, which is just a coin in the capital used too much return on profit.