I bought around $8k in 2018 on average I think.

If I'm honest, I also have shares that have gone up almost much as Bitcoin, mainly in technology and biotechnology.

I am pretty well diversified anyway.

No goal. I just use Bitcoin as part of my general portfolio for diversification.

I plan to keep at least 50% long term.

However, I am worried about the electricity use of Bitcoin. If, for example, Bitcoin were to replace the dollar as the world's reserve currency, it would need twice the amount of energy the world currently produces (or something like that).

My OP is essentially advising people to stay diversified with their investments, and don't be afraid of rebalancing.

It's the whole point of holding. So that we can ride the wave to a particular target price after a few years and sell of for profits, right?  

What matters most is that the selling price was at a point where you felt was your target price and not having to hold for 15 years and not enjoy the benefits of your patience over the years.

I also usually sell off whenever I realize profits that I feel satisfied with. I am not the type waiting for 10,000%  growth in value to sell.

Self satisfaction is needed in each and every sphere of life. After selling your asset's with satisfaction is a big thing which can be considered as relaxation on your mind set. 3 years of holding is unbeatable. I tried from the very beginning of using crypto trading that I will hold some of my funds for a long time but for some reasons I can't do it. Still trying to hold.

Isn't the term having diamond hands for holding out when it comes to investments in trading of any sort like stocks?
I have always thought the term HODL was for those who were thinking of selling when the markets were pumping but others are advising not to do so in the assuming it will keep rising in the long term.

But I am fully with grabbing profit while it is available especially if the OP bought at $8k to cash out at $60+k.
There is no other stock which can say they made this amount in profit within such a short time.

That's what we are looking for, the word "satisfying" this what the most important.  There's no regret if you sold out your Bitcoin now but at least not all of them.  The 5% was might your initial capital since that investment was on 3 years ago from now and it was probably folded for how many times.

The rest if you didn't need the money yet, you can HODL as long as you can because there are too many predictions and rumors that Bitcoin price will reach another ATH of $100K on this year.  If you believe this theory, there are more profits will come precisely.  So, it is really worth it to wait even too long at least you can able to wait for it patiently.

Good to hear that there's a long-term investor like you, just keep holding.

Those are common emotional personal feelings about braking the true essence of hodl but it isnt bad to take up some profits for the sake of completion or success because
we do have one common goal in here which is to make profits no matter it can be taken in short term or long term it wouldnt or doesnt matter.
Good for you that you do able to sell off your bitcoin and make out profits and holding for 3 years isnt something that someone could able to do so.
Cherish while you still can and its great that you do only sell out a little percentage into your overall holdings.

Yeah, of course, being practical counts. I admire you for that.

Putting your money in a single basket is more discouraged by investors than encouraged. Also, I don't think "HODL AT ALL COSTS" is admirable. It is not that amazing. It is myopic. If you hodled Bitcoin through the worst of times, that's of course one thing you should be proud of, but if you are all in and you are into hodling no matter what happens, I don't think you are acting wisely.

Well, there are also cons to selling Bitcoin too.

I live in the UK and am self-employed and work through my own limited company and so am under extra scrutiny from the tax authorities.

The single biggest reason for me selling today was that my accountant confirmed that:

-They are happy to calculate my Capital Gains Tax liability
-I am now insured for any investigation from HMRC (the UK tax authority)

Else, I would have been buying and selling dips for the last year.