This might be more personal as well confidential to we all, but if you're to share your thoughts or advice one on how to spend he's/her 1btc what would that be ?
Estate management ?
More in Bitcoin ?
Investment in the Stock market ?
Maybe your ideas might or will be helpful.

It is your Bitcoin. If you need more advice from what you can do with that 1 BTC, just hold it and leave it, considering that as of writing this, BTC is now priced at 55k. Do not bother with most of the altcoins if you are thinking of selling it, imo.

It's really not advisable to seek financial advises here, as we are not professionals.

And we don't know where you living, some members here might be in a developing country and obviously that is a huge amount for them and can buy real state and could be set for life.

But if you are living in a country wherein the standard of living is very high, $55k is not that huge amount.

Let it sit as Bitcoin maybe? Honestly, if you had the money to invest 1 Bitcoin, I'd believe you'd also have enough money to invest in a bunch of other stuff without affecting your life. If not, and you can't afford to invest more, then I'd suggest spreading it, make your portfolio bigger, but don't lose out on your investment in Bitcoin itself. Maybe leave half? Then invest the rest in altcoins, stocks, land, etc, whatever you want really, up to you. Make money using money and you'd honestly be fine.

Well for me if I have that amount of BTC and living in the country with a cheap electricity rate then I will start a small mining farm.
Because I believe that I could make more profit on mining than holding it and the ROI depends on how cheap your Electricity rate in your area and depends on what miner you bought.

This is not recommended for non-believer but for me, this is what I think that I'd like to do with 1 BTC.

Another option is trading but if you don't have knowledge about trading then it's very risky because you can lose a lot if you don't know how trading works and how the market works.
So the best for me is to start a small mining farm.

Be careful on cloud mining this is not what I'm talking about they are most likely scam.

Anyone giving you financial advice would be morally responsible for potential losses that you might incur, so please do not ask other users about how you should spend your bitcoin. Anyway, most people would be more interested in how to obtain 1 btc, rather than how to spend it. Because, you know, if you live outside the US in some third-world country, such a big amount of money could be life changing. Moreover, given that the total supply of bitcoin is fixed and more and more people begin to consider bitcoin a good means to hedge against the disadvantages of the traditional monetary system we have today, it is becoming evident that the price of bitcoin will go up while the amount of bitcoin you need to change your life will go down. As for me, I woudn't spend something that will surely be more valuable in the future.

That is a very broad question leaving space to multiple answers.However the best answer which I can give is the one what I would myself do with 1 Bitcoin right now at an average cost of 55.000 US dollars.Here where I live you can buy a house with such money and we all know that real estate only increases in value over time so it could be a good long term investment.

You can opt to put in the bank to receive interest but it is ridiculous the amount any bank offers so this is a no go option.You can buy a good car for yourself at 20.000 dollars and another 20.000 you build a few mining rigs while keeping the remaining 15.000 to spend as you like.

For me, I will ask myself what the reason for having the Bitcoin, but if is just earned somehow, I will divide it into two, invest one half back to bitcoin for the other half I will invest into my Catering business as well as my orphanage home.

If I were to invest 1 BTC then I would rather choose to diversify the amount into various investments. I already have a list of investments though.

Cryptocurrency - why not buy some altcoins or hold some of your BTC for the future
Stocks - handpick some stocks and invest in it for long term
Gold - always a safe and good investment
Real Estate - I have  a craze for it
Startup - Always wanted to invest in startups and own business that could yield me passive income

Maybe he wrote about mining.
In a growing market, this will be a dubious investment, but in a falling market that can last 1 year or more, it can be a good investment.
Of course, you need to have access to cheap electricity and have a little experience.
Or invest in some DeFi project to lose coins