Myself have a different story, because I spend around $20000 for investment. It was quite amazing to see the growth of the portfolio. At some point I missed the path towards trading and got into gambling. At the beginning I was a responsible gambler who used to have the limits. Later my mind lost control, and this made me go behind the losses and ended up with a massive loss. Hope someday I'll get back the losses through further investment.

Investing does not necessarily mean that you pay money out of your pocket, but any deduction of any form of wealth you have (money, time, advice, work, etc.) is considered an investment in Bitcoin, otherwise you may spend it on something else.

What I want to convey is that you have paid a value, and that value is not required to be material. Once you keep the money you collect from signature campaigns without converting it to dollars directly, it is considered an investment in Bitcoin.

There are a lot of people who received Bitcoin donations even though they didn't know anything about it, and sometimes famous players get a few hundred Bitcoin and keep it better than a trader who panics and sells.

Many of my friends still don't inevst on bitcoin they just look for bounties and do work there by investing their time and hard work. They still own crypto . I think it's still somekind of investment.
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Not everyone can afford to hold a bitcoin.

If you didn't give value to time, effort and electricity then you will have tons of story here including mine since I got my first Bitcoin through faucet and signature campaign here in the forum. I just slowly grow it by trading altcoins here P2P before. I remember staying awake or setting an alarm hourly just to claim from hundred of faucet regularly. By that time, I can claim 0.001BTC and above on each faucet on my list. I sold most of my early earning on 2017 bull run then invest on physical business which I'm currently operating right now with the help of my wife.

Right now, I'm currently a businessman and leave my career to build my own company.

You don't really invest in bitcoin to benefit from it. Some people use it as a payment gate/processor like VISA/MasterCard. They collect the agreed amount of USD via Bitcoin (or some other crypto) then they convert these coins into USD or some other asset immediately. You can't judge people for this. Crypto is still an experimental project. It solves a real world problem but we still don't know if bitcoin will survive the next decade.

That is actually true. Poor, but smart bitcoin adopters have made a lot of profit (in bitcoin, not dollar) during the early days when bitcoin was still in the three or four houses digits. Instead of converting their funds to fiat, they have just held their precious coins, waiting for the perfect moment to finally enjoy the fruits of their long run visionary patience, that hasn't came yet for many, even thought bitcoin was able to reach its ATH recently.

On those times it wasn't exciting to think about the profitability possibilities. But seeing from today's perpective back then, it's insanely incredible! Just an example: Some years ago it was possible to make 100,000 satoshis from a faucet run which shouldn't take 2 hours of your time, that is equivalent to a 50$ daily income taking the currently market prices!

Just think if you didn't spend any satoshis you earned back then (that happened for real, it's not an hypothetical scenario), you could have accumulated 1500$ dollars in a monthly basis, working only 2 hours a day!

When I first entered this forum, I never invested a penny in crypto. I'm looking for an income without capital on this forum, the investment I really do is invest time to work on each campaign that exists. and for every campaign that I work on, I get rewarded in the form of coins for the campaign project that I'm working on. sometimes I enter some contests that pay in dollars.

I didn't invest anything at first, but then after getting rewarded I started managing every investment I wanted to make. Do not be discouraged, there will be many ways to get it.

satoshi probably has never paid a single $ for Bitcoin.

Bitcoiners with zero investment is kinda legit especially way back a few years ago.
For me, I can't say it is zero investment because I got my first Bitcoin on somehow like a job where I worked on and they paid me Bitcoin, so I can't say I got it free, I worked for it.
I can say it is free or zero investment is when people ask for Bitcoin for someone and they received Bitcoin without any work or task or anything they did, they just gave their Bitcoin wallet address and they already received.

There are also people who are telling that they don't put any money on it like "airdrops", there are some airdrops who got some task before giving any Bitcoin so it still works. And some also legit giveaways which is can be considered as free too.