Historical: Today We Celebrate PIZZA INVERSION: On 22 May 2010 You Got 2 Pizzas For 10,000 BTC. Today You Get 10,000 Pizzas For 2 BTC!

Here's why this "Pizza Inversion" happens exactly at 62500 USD per bitcoin:

On 22 May 2010 Laszlo Hanyecz from Jacksonville, Florida, settled the purchase of 2 pizzas for 10,000 BTC on bitcointalk.org [1],[3]. The value of these 2 pizzas together was 25 USD [4] (and not 41 USD by the way, as often erroneously reported in various sources on the internet with reference to [2]. But what is relevant for the legendary pizza purchase is only the real-world value of these two pizzas and not the BTC exchange rate four days earlier on an unrelated BTC exchange).

On 22 May 2010:
10000 BTC = 2 pizzas (each pizza having a market value of 12.50 USD)
--> 10000 BTC = 25 USD
--> 1 BTC = 0.0025 USD = 1/4 cent

On Pizza Inversion Day (13 April 2021):
10000 pizzas = 2 BTC (each pizza having a market value of 12.50 USD)
--> 125000 USD = 2 BTC
--> 62500 USD = 1 BTC

Fun facts:

• Bitcoin's increase in value from 1/4 cent to 62500 USD corresponds to an increase by a factor of 25 Million, or an increase of +2,499,999,900 %, i.e. 2.4999999 Billion percent, or ca. +370 % p.a. on average within this ca. 11 year period.

• Today, the 10,000 BTC are worth 625 Million USD.

• For number mystics: The time between Pizza Day (22 May 2010) and Pizza Inversion Day (13 Apr 2021) is exactly 3826 days. This is 2 times 1913. In the year 1913 the FED was founded.

References:
[1] https://bitcointalk.org/index.php?topic=137.0
18 May 2010, Laszlo starts the thread "Pizza for bitcoins?" and offers 10,000 bitcoins for 2 pizzas.
[2] https://bitcointalk.org/index.php?topic=137.msg1146#msg1146
18 May 2010, ender_x writes: "10,000... Thats quite a bit.. you could sell those on https://www.bitcoinmarket.com/ for $41USD right now.."
[3] https://bitcointalk.org/index.php?topic=137.msg1195#msg1195
22 May 2010, Laszlo writes: "I just want to report that I successfully traded 10,000 bitcoins for pizza." (plus link to photos of the two pizzas)
[4] https://bitcointalk.org/index.php?topic=137.msg1526#msg1526
18 June 2010, Laszlo: "I will trade 10,000 BTC for 2 of these pizzas any time as long as I have the funds (I usually have plenty) [...] The exchange is favorable for anyone who does it because the 2 pizzas are only about 25 dollars total" --> with "2 of these pizzas" he clearly referred to the pizzas he purchased 4 weeks earlier, on 22 May 2010