Who knows what the future holds for listed stock valuations? Will the market grow or fall back or stay about the same? I doubt any one can be sure.
Perhaps the best answer is to hold, that is not sell that stock you have owned for a long time and that has gone up in value more than your cost.
A reason to not sell now is if you live in Oregon, California or other high income tax state but are planning to move to Nevada. Why pay that state income tax?
If you are planning to donate the stock …