Blackbird: Bitcoin arbitrage

I will tell you that any working piece of code that allows someone to make money, is not public. Use this if you want to inevitably lose money.

That seems like a silly statement to me. Obviously, huge amounts of code that "allows someone to make money" is available publicly, for some definition of "making money" or other. I am guessing your statement is specifically directed towards code that is meant for trading markets and referring to the efficient market hypothesis. That may or may not be true but I think it would suit you to at least back up such a claim, especially when it comes to crypto currencies which are obviously a very immature asset class.

Yea he means trading systems. There are thousands of people selling “trading systems” for the stock market, by definition none of them work.

An example is why Warren Buffett got special permission from SEC to withhold reporting his trades for longer periods then normal. If you know that WEB bought a stock today, then you know he’s done the research and it’s a clearly profitable trade to buy and hold it for the long run. If WEB had to report trades daily, he’d be out of business, he’d never be able to buy more than a tiny amount of a stock in a single day, because the next day its price would have increased at least 20%.

Selling any kind of successful trading system is to invite others into your trades and make them less profitable for you. Selling the system only makes sense if the system is unprofitable or it's so thinly profitable that selling it to suckers is more profitable.

If the price of the stock would increase tomorrow by 20%, why wouldn't he be able to buy more than a tiny amount today?

Warren has over $100B invested in public equities (stocks). He’s s believer in concentrated portfolios, ie he doesn’t want to own more than a few stocks st a time. If he can’t buy $10B worth of a stock he’s not interested.

There isn’t a stock in the world you can buy even $1B of in a day without driving it’s price up dramatically yourself. So Buffett has to slowly accumulate a position over weeks and months.