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This is impossible to read as every other sentence sounds like it was written by an LLM. I had to stop after a few paragraphs.

This is a very weird use of terminology. None of Jane Street, Millennium or Citadel are High Frequency Traders (HFTs). Jane Street is a prop trading firm who engages in market making, but is not primarily known for HFT - they are grey box (i.e. human-in-the-loop) which on the spectrum of market making strategies, is pretty much the opposite end from HFTs. Other firms in this bracket include SIG and DRW.

Millennium and Citadel are both hedge funds, who do not engage in market making at all. They are most similar to other multi-strategy hedge funds like Balyasny or Point72.

You may be thinking of Citadel Securities, who are a market making firm and do engage in high frequency trading. Other large and well known HFT firms include Hudson River Trading, Tower Research, Jump Trading, Virtu, IMC and Optiver.

> The continuously updating global population counter is based on current aggregate birth and death rates (approximating values such as those from the U.S. Census Bureau International Database or UN DESA). The "live" births and deaths per second are statistically generated fluctuations around these averages to enhance the dynamic feel.

Ok, so you added high-frequency random noise to the estimated averages to make it feel more realistic. To me, this makes it feel less realistic.

Anyway, don't mean to gripe, this is a cool project!

Why do the estimated births/deaths per second counters have so much flicker? Surely you don't actually believe that the expected number of births/deaths per second fluctuates at 1dp precision multiple times per second?

Some Welsh, Scottish and Northern Irish people may take issue with your definition of "England"

Adam => Ad => Adkin/Atkin => Atkins/Atkinson

They are using "parks" to mean "settles"

- Salt, Fat, Acid, Heat by Samin Nosrat

- Ruhlman's 20 by Michael Ruhlman

- How to Cook Everything by Mark Bittman

The most common sizes for milk to be sold in are 1.136 litres and 2.272 litres (i.e. 2 pints and 4 pints)

The currency was USDC, which is a stablecoin pegged at $1 by Circle (www.circle.com) who are generally held to be reputable, so it very much was real money.

They are all very good choices.

Yes.

About the same, with lower volatility and much lower drawdowns (that's net of fees -- before fees they are much better).

In the UK (where I am) the main ones are SIPPs and investment ISAs. In the US I believe people mainly use Roth IRAs (this is not any special secret advice, it is like the first thing your tax adviser will tell you).