The run-up on space stocks and your strategy

Hello all, so I have a good problem at the moment.  On a stock like RKLB, I have a total gain % of **765%** right now.  In the recent past, I have cashed out gains of 4,700 total in a few lots, which is about 80% of my Cost basis total.  So right now, I have about $6K invested with current value of a little over $51,000.  So right now I’m looking at an unrealized gain of  $45,000.  I’m wondering if others have some sort of “rule” in place for this type of circumstance. I’m stuck in that limbo of wondering if I should take some additional gains and put it in a standard S&P fund, and/or something like SGOV (would have to pay taxes of course on LTCG)…or just ‘letting it ride’ and see where it gets in 3-4 years when I might have to sell off a decent amount when I need the $$.  I am fairly new to brokerage despite being middle-aged.  I liked a stock like this (**and ASTS/LUNR/PL holds as well**)…because I saw and looked at them as disruptive technologies…and read the tea leaves on the sector I guess.  I am going to have the same consideration on AMPX as well.  I know, a good problem.  Despite doing DD on these stocks. I must admit I did not have an exit or real profit-taking strategy, so that is on me – again being somewhat new to the brokerage game.  I know there are some generally some rules about profit taking out there, **i.e.** when it hits 100 gain %, cash out ½ of your shares, etc…but I am currently in this limbo of taking some gains vs. letting it run.  Thanks for any insight you can share or if you have a general stance/profit rule on this.