So far I have not heard it. your case is very unique and sounds weird.
why do you lock your assets, everyone wants to enjoy their success.
the best way is to buy real assets, such as land and houses.
I agree with that mate, buying assets that will turned to a much higher appraisal after some years of holding like lands or real estate properties, you can lock your money in such way if you are really aiming not to use it.
The only thing that maybe possible is when you got tired of waiting as you can sell it out to the value you desire.