I had a similar experience this year; I was laid off at the beginning of the year, but my severance took me to 95% of my FIRE number. I thought it would be OK, but what would the markets do? 5 fortuitous events later, including 2 pharma buyouts, and I am 40% overfunded--reverse SORR!
First, it speaks well of you that two of your emotional / knee jerk responses are to give to others. I think that's one symptom of having plenty.
In all of this, pay attention to the tax treatment, for yourself and potentially for the recipients. You don't want to be bumped into major pain, i.e. short-term capital gains, losing ACA subsidies, etc. You could afford those now, but don't do it accidentally / stupidly.
What to do different? Given that you have an element of fear, go ahead and beef up your emergency fund. Sure, 6 months is recommended, but go ahead and have a year or two of cash. Does that maximize your return? Heck no! Does it help you sleep better at night? Maybe! And so, like any luxury, it may only make sense to you, but it may be worth it.
More generally, it sounds like you enjoy the stockpicking game. (Easy to say, as you have had a successful year) But you are also fearful, and whatever your goal was you don't need to be as aggressive now to reach it. So, in addition to simple safety money, you could transfer a good chunk of your new wealth into index funds. Why? Because they are low maintenance, and you can move on to other things. If you enjoy the hunt, you could keep it all in play, or you could still leave a chunk there, but index enough for what you "need" for FI, so that you aren't at such risk on an ongoing basis.
For giving your business to your employees: have you done a valuation recently? Is it structured n a format where you could easily split ownership; say, into shares or partnership units? Do you have a succession plan in place? And most important, do you know your employees would want to own it? If this all looks good, I would suggest you could start an ESOP or other multi-year transfer plan, to help them manage the tax implications of this gift / illiquid income.
Have fun dreaming big dreams!