Just sold 5% of my Bitcoin that I've been holding for 3 years and I feel satisfied doing so.
I didn't need to sell, and it was mainly for the satisfaction of getting back some of my original investment.
However, I also feel like its broken the "HODL AT ALL COSTS" mindset which I felt was getting a bit unhealthy.
I do feel there are risks with Bitcoin, and I won't drag people down with that here, but I will be diversifying that money into gold and shares, mainly tech shares.
If Bitcoin dips a lot, I will also buy some more Bitcoin though.
Basically, I'm glad I sold some if only to stop feeling like a slave to it (and to test the Coinbase selling functionality which only took seconds for the transaction).
My first selling is 20% of my total asset mate , and same feeling as yours .. also i convert almost 70% of my altcoin into bitcoin after that selling because i think it is more worth holding that Shitcoins .
Selling when we have made a big profit is the thing to do, bitcoin can go down at any time so when we sell and already make a profit then it is the right thing, I first bought around 1.2 btc in 2015 when the price was around $240, and I immediately sell when you get 15% profit, for me this is a big profit in 3 months.
I think maybe what you say is already the best you have done but actually if you want to be patient again of course you will be able to get something bigger.
because we know that bitcoin will always have a halving every 4 years and at that time there will be a sharp increase from the last ATH, actually you can do that because it is certain that bitcoin's decline is only momentary and will move up again after the halving.