The Bitcoin he sold is a lot of money at current prices, but he is incredibly memorable. I heard a story where he sold 10,000 Bitcoins to buy pizza, just to buy pizza but it made a transaction of 5050 Bitcoins for just $5. This story teaches you that those who sold Bitcoin in the past must have been fools because it has become very expensive now and they are just regretting it. So it is necessary to hold Bitcoin, not sell it.

In July 2010 Satoshi Nakamoto suggested Bitcoin donations as a way of covering their web hosting costs. Martti Malmi provided an address to receive these donations: 14EXchS9j3AAfim6mL4jtw6VWMosSUiG5U

This address was inactive until 2018, when 0.00010000 BTC was sendt to it. The sender was none other than Laszlo Hanyecz, famous for buying a pizza for 10000 BTC in May 2010 - the first commercial Bitcoin transaction.

He presumably wanted to remind them of his great sacrifice.

From the comments that I have read so far, on this thread it's clear that we cannot tell for sure who used bitcoin first because there's no clear record that has verified this.

However, we wouldn't stop to acknowledge those who were part of making bitcoin possible for trading because they are part of the people who made bitcoin where it's now.

Well, Satoshi gifting Hal was a different case with Martti Malmi selling 5,050 Bitcoin for $5.02. When I started learning about Bitcoin I also came across this piece of information that OP shared which thought me that this trade by Martti Malmi was what established the first valuation of bitcoin against the U.S dollar, since 1,010 Bitcoin was sold for $1 by him. This happened in 2009 even before the famous pizza event in 2010 which based on what I just learned from your post, the pizza was not directly bought with Bitcoin

I don't think it even matter whether he bought the pizza with his credit card or not, what matters was that he sold the pizza in exchange for Bitcoin. Just like the analogy Hamza2424 gave, assuming I bought a gadget from you and you accepted fiat payment, then I sell this same gadget to someone else and the person pays me with Bitcoin, will I not tell people that I sold the gadget for Bitcoin?

However, it's still good I get to know more about this story.

Well he did buy the intermediary (Jeremy)'s service to buy Pizzas

NewLibertyStandard (Malmi) also created the first Marketplace thread here in the Forum (thread No. 24, January 2010). In the OP he offered to buy paper bowls, plastic cups and paper towels for BTC  Another user @Xunie offered a small video game for 500 BTC in the same thread. But afaik there are no records of transactions that really took place here. Anyway it may be an interesting rabbit hole for those wanting to track down these users' addresses from back then ...

There is also this alleged purchase of a JPG in January 2010 for 500 BTC. This is the Bitcointalk thread.

Yes, he would probably make a lot of money if he could sell now.. but at that time people didn't really think about holding Bitcoin, so when they had the opportunity to sell, they would do so.. remember that Bitcoin wasn't really known as an "investment" at that time. Also what he did was something really great, because directly with that sale he set the first price for Bitcoin.. something we should appreciate because he played an important role in Bitcoin's early years.

All to begin with, congratulations to him for all that of his technical efforts and resources put together that had encouraged the usability of how Bitcoin or crypto currency can be bought or spent through the Centralized systems you can swap your coin for fiats as means ot exchange.

For the crying out why the Bitcoin history will be incomplete without acknowledgement of the Sirius might make some senses but one thing for sure is that there is definitely not going to be any historical data about Bitcoin that would contain of of the comprehensive historical datas about Bitcoin.

Bitcoin is censorship resistance that the white paper has the details for the Bitcoin core, if we also its extinct exhibitions, there is always going to be those in one way of the other contributing to the cryptography networks and as well those influencing the monetary system and market in their own respective fields or efforts.

Perhaps the invention of the Sirius has really been a great one that really had added a more convenient which we can use our Bitcoins.

You're not even close
- I give the supermarket fiat, I leave with the groceries
The pizza parallel would be
- I give you 20 packs of cigs, you go to the supermarket, buy me two bottles of whiskey, and come back

The major difference: the second case still and always has the first one embedded; for the second case to wrok, there will always be the need for you to give fiat to the supermarket to buy the bottles of whiskey in the first place!

Yes, and the supermarket might had partially traded with a supply chain from China to have those groceries available to you. Suddenly, yuan is required to complete the entire trade, and the US dollar is not enough!

My point is that a trade between Lazslo and Jeremy completed in Bitcoin. What Jeremy did behind the scenes does not negate that Bitcoin was used as money for that particular trade.

If this transaction is considered barter-based, then buying electronics with EUR from Amazon.com is also considered barter, because there is an intermediary who trades the EUR for USD. But, this is obviously not the case. Both EUR and USD are media of the exchange.