In your example, a stock went up 10x overnight. Mature stocks don’t do that, so you must be investing in something very risky.
What a tax would do is incentivize you to realize some of your gains to pay the tax. If you don’t want to do that and would rather keep gambling, then you’re free to do that. If the stock then crashes and you lose all your money that’s on you.
Obviously you have to think about implementation to make sure you’re not charging a tax that people can’t pay, but that can be figured out.
In your example, a stock went up 10x overnight. Mature stocks don’t do that, so you must be investing in something very risky.
What a tax would do is incentivize you to realize some of your gains to pay the tax. If you don’t want to do that and would rather keep gambling, then you’re free to do that. If the stock then crashes and you lose all your money that’s on you.
Obviously you have to think about implementation to make sure you’re not charging a tax that people can’t pay, but that can be figured out.