donation for what? How can holders get benefits from it?
Sadly, after so much time on the forum, you didn’t understand some basic things. Satoshi explained it in the simplest way, he is even quoted in this thread. In short, the total amount of Bitcoin that can exist is 21 million (more precisely a little less than that), so every lost Bitcoin reduces that number and makes Bitcoin more scarce. Imagine what the situation would be like today if Bitcoin was capped at 12 million or that number is 40 million?
They were lost forever so if you think it can save the price of bitcoin from the fluctuation because of that reasons, stop it as it's very obvious that its still useless because big investors still have the power to manipulate the market even though there are some lost bitcoin in the space, they're affected as well indeed so its nothing in my personal opinion.
Of course, they can manipulate the crypto market, just like any other market if you have a lot of money and knowledge on how to do it. Everyone wants Bitcoin to be more adaptable, to be available to everyone and everywhere - but not to be available to people who want to make money on it. I can only tell you that you can continue to live in illusion, or accept reality.