I think the 80% rate is up to a certain amount. Above that amount is taxed as regular income. (I could be wrong)
Long term Capital gains tax tops out at 20%...You don’t have an accountant? Maybe it’s time you find one....Dems would be more than happy to raise the long term capital gains.
If you are sitting on a huge capital gain, you should talk to your accountant about it. Perhaps selling off parts over time would enable you to liquidate the position without onerous taxes. The other thing to consider is that regardless of the incredible economy DJT has brought us, we are eventually going to have a major correction in the stock market. I would hate to see you lose significant value b/c you held onto a position b/c you were worried about the taxes.