In addition, Tesla appears to have bought a total of 46 000 BTC at an average price of $32 610, but sold 10%, so the total amount of BTC is now 41 400 currently worth 2.375 billion.
This is an example of the level of potential profit one can make if he/she invests for the long term and with a large amount of money.
Yes, you may lose out on the opportunity cost (i.e. that something else you could have put that money into) but the risk is proportional to the reward.
So, the fact that $1B is the profit made so far shows that the risk taken would have been payed off if the coins were to be sold at today's price.
Is is also an example of the level of market power some people can have...