How will it vanish into thin air?
In theory, the shares at the time of purchase are worth the amount of cash that the market price is. The owner of the shares may realize a net gain or loss relative to their own purchase price but that doesn't change the fact that $X of shares are being exchanged for the equal and equivalent $X in cash. So what is being redistributed?
> "How will it vanish into thin air?"
As the shares trend from price $X to zero, where does the value go? Answer that and you will have answered your question.
https://www.thoughtco.com/is-burning-money-illegal-3367953
Selling it for a dollar doesn't lower the value of the assets or stop it from circulating back into the economy?
Another idea is to find someone who will sell you something at face value, that they also acquired for face value, such as silver bars or copper bars or something of that nature.
In that scenario, the person who originally sold the metal to the guy who sells it to you will have made a profit, but not a very big one after accounting for the expense they went through to obtain it. This is one way I can think of that avoids the technical illegality of defacing currency.
But I would definitely put the cash in a shredder or burn it. It will be quite difficult to prove what you did with the cash-- you can just say you spent it on consumable goods like food, drinks, vacations, blah blah :)
Not sure how legal would it be to buy a block of potentially more valuable land and put nuclear waste on it both paid by your money?
I guess, other ideas include paying selective group more and target loans for risk taking behavior causing holes in a small economic country by creating instability and inequality. Maybe pay people to pollute their land? Marketing to make people unhealthier and reduce their life expectancy or invest in scams/drugs? Although all of those seems less direct and depends on generating negative value to counter the spread of money.
Buying silver with your cash and then sinking it to the bottom of the ocean would definitely destroy economic value. Silver is used for producing goods and protecting against inflation. If you start destroying silver faster than the world is producing it, you will measure your economic impact by the rise in price of silver, since you reduced the supply. It currently isn't illegal to destroy silver, but the US govt has made laws in the past regarding the confiscation of silver in times of scarcity.
Putting nuclear waste on land, specifically useful land like manhattan or etc would also destroy economic value and also be highly, highly illegal :) It would desttoy money and make people's lives hard, because they would have to spend money to relocate away from all the nuclear waste. Skyscrapers and tunnels would become worthless as there's no reason to go near them anymore.
Convincing people to give you money in a scam also destroys economic value because they are not getting anything in return for their money sent to you :)
Ultimately, the world economy is built on labor and resources. If you destroy resources and also make it impossible for people to perform labor, then you've destroyed value, measured in dollars :)
One idea I could think of is funding legal euthanasia (where it's allowed). That should be 'ethical' and cost economically more in the long term disposing value you invested.
Human life in UK for example costs about 2-4 million dollars.