You have a good investment plan, but the problem is it's hard to tell when bitcoin will certainly reach that point. Although the market looks more bearish, but the movement of bitcoin is still unpredictable. It goes back and forth, up and down. How about try DCA so you will never miss the perfect opportunities to buy. Setting a good price when to buy is good, but as bitcoin is highly volatile, we can never tell if it has reached its bottom price or not.
He knows it already that it's hard to predict the price that's why he decided to came up with a plan like that and I think it was still like a dca because he did already bought some but then he prefer to keep the other half of his money in preparation in case price dips more.
It seems he is contented already so it's not a big deal if the price continues to rise and never fall again and there won't be a hard feeling if ever price starts to nose dive because he didn't risk huge but he will be glad because he can try his other plan and that is buying bitcoin at a much cheaper rate. It's important that we set our preferred price so that we are organized.