I wonder in what price he buys bitcoin

If he buys bitcoin at $8000, he is not losing his money because bitcoin price now still in the up to $9k and he make more than $1k if he bought 1 bitcoin. But that will give him the profit only if he still kept his bitcoin from the first day he bought until now so he can sell it right now to get his money. Assume he bought bitcoin at 1st July at $49xx and he held until now, means, right now, he is making a double profit from the money and that profit will bigger if he can hold for a long time.