Yes, the USD/China difference is probably the biggest arbitrage opportunity right now, if you have an already verified
Chinese exchange account at your disposal (otherwise it is probably not possible to verify an account right now with
the upcoming shutdowns) or have some other way of buying BTC in China.

Are you only arbitraging GDAX and BFX when the opportunity arises?

Interestingly, the gap between BFX and an exchange from Brazil (Mercado Bitcoin) is even bigger than the gap between USD/China
(in the other direction, therefore you wouldn´t even need to bring a bag of cash).

My ATH guess:
16/08/2018

Reasoning:
A big part of the current 2017 bull run of Bitcoin was caused by the altcoin mania and the ICO frenzy. In order to participate
in this hype Bitcoin often was and is the easiest on-ramp to get your money into the cryptocurrency system - as you know
most altcoins or tokens have no direct fiat trading pairs.
In my opinion we will see a new ATH in ~11 months (see my 16/08/2018 guess), because by then many
people will realize that many ICOs had terrible business models or were outright scams. Some of the people
will put their remaining funds after the ICO/altcoin fallout into fiat currencies. But the big majority
will shift their position into the one and only Bitcoin, which will have improved tremendously in the meantime
(2nd layer stuff like Lightning, privacy features in order to increase fungibility and anonymity).

This move from altcoins and the many vaporware ICOs will bring back the marketshare that Bitcoin lost
during the scaling debate:
https://coinmarketcap.com/charts/#dominance-percentage

Additional prediction:
After reaching a new ATH around ~August of 2018, things will get really parabolic in 2019, when people realize
that the purchasing power of their fiat money has eroded even more (changes to the EU treaties, additional
stimulus programs by FED and ECB and negative interest rates finally coming to a mainstream bank near you).
In the prelude to the next block reward halving (a few months before the halving in 2020) we will
finally be able to see 20000 $ / Bitcoin.
Mainstream media coverage will explode even more at this time, which will lead us to ....

I highly doubt that this is possible.
I just tested it and received an error message: Pool entries are now closed

@Nitrogensports
Am I allowed to open a new Nitrogensports account, if I decide to abandon my old account? I´m not doing
this in order to circumvent betting limits or any other nefarious purpose.

This is actually a disadvantage that I didn´t think of.

However, this criticism also applies to LTC and ETH. You don´t even have to go more than 6-7 months in the past
in order to be able to look at a LTC price of 3-4 $.
If LTC or ETH starts a correction into the single digits, this would cripple the fiat value of the bankroll.

A possible solution would be to integrate a service that exchanges many altcoins into Bitcoin. On the other hand,
this creates the problem of additional fees.

What is your opinion regarding the relaunched BTC-E?

https://wex.nz/news/1

Currently the crypto prices are inflated compared to all other exchanges, which creates a tremendous
arbitrage opportunity - if you are actually able to get funds out of Wex. Roughly 15-20 % are possible
at the moment depending on the crypto and the particular exchange you use for the other side of the trade.

Besides, it could be a potentially profitable move to buy some of the issued tokens. After all these exchanges
make a fortune, so I´d expect them to eventually reimburse everybody.

Is there a website that does track the actual average amount that it costs in hardware costs and electricity to mine
a bitcoin? This would be useful information for trading purposes, because that would really show where
strong buy support would come in (e.g. miners propping up the price to still be able to mine profitably).

Probably, you would also have to incorporate other expenses like taxes or payroll in the calculation (after all
someone has to maintain the mining operation and the respective state / municipality wants a cut of
the profits, too.

And pay ~1 % fee to a service like Shapeshift every time? In my opinion this kind of defeats the purpose
of gambling at a site with 1 % house-edge when you are already down 1 % due to exchanging your
altcoins before even loading the dice game 

I´m not saying that Dean should add every shitcoin available, but a few popular additions
would be good. Try to see it from the point of BKB token holders, every additional altcoin
increases turnover and therefore also site profits in the long-term.

I think I have found another bug.

The stats box of the NCAA football match Purdue @ Missouri states that
519.71 mBTC have been matched.
However the list of positions shows only a single bet of 271.11 mBTC (07:19:55   1.917   271.11   
Over 76).
Therefore I´d argue that the volume calculation is not working as intended (it should
be 544.22 mBTC in my opinion).

This happens at other markets as well, I just picked the game as an example.

Finally, someone who shares my sentiment regarding the significance of provably fair gaming!
Thank you for the link, I was not aware of this website before.

As I already stated in one of my earlier posts, I heavily believe that once one major brand adopts provably fair gaming,
the other brands will be forced to adopt the technology as well.

The reason that mining is so attractive in China is not the potential of cryptocurrencies, but rather the huge
amount of excess energy supply. In several rural provinces the electricity company is either cooperating with the
mining operations or even running the operations themselves!

This isn´t really true. The mempool only has a few thousand transactions most of the time these days
- since the spam attacks on the Bitcoin blockchain stopped.

Therefore even very low fee transactions with a few cents are getting processed in 1-5 blocks.

The reason why the average transaction fee is still so high is, because some users just don´t have
a clue that they could get away with a much lower fee and the fact that many wallets use terrible
standard settings for fees (and the average user is lazy and doesn´t bother to customize the settings).

It is highly unlikely that any exchange will credit a SEPA deposit over the weekend, because
banks in Europe are not processing transactions at the weekend.

Besides, most exchanges are currently faced with a surge of new registrations and extremely high volume.
Therefore support response times and the credit of new deposits are slowed down!

E.g. at Kraken even Fidor to Fidor (same bank) deposits are taking several days, while they
were instant before.

I agree that the current lending rates for Litecoin are extremely attractive!

However, you should keep in mind that the interest rates are directly correlated to the amount
of opened LTC shorts (and the demand for additional short positions). LTC value will probably drop a lot and therefore
I´d strongly advise you to only take advantage of the high lending rates for LTC,
if you intend to keep your Litecoin for the long-term and are fine
with sitting out a prolonged bear market.

Has anybody secured their Bitfinex account using a hardware device based on the U2F standard (e.g. Yubikey)?
I´m thinking about doing just that and was hoping that someone who uses a device like this
could share his experiences.

Additionally, there are great lending rates available due to the current bear market
(especially for Litecoin!).

How do you know that the mentioned persons haven´t sold parts of their holdings? It is definitely possible
that they have cashed out significant parts of their Bitcoin holdings (irrespective of what they are
claiming on platforms like Reddit or Twitter).

I assume that these big walls are put up by ICOs that want to convert to fiat
or BTC while Ethereum is still above 250 $ per ETH.

Probably Tezos or one of the other ICOs that raised a ton of funds and has no
actual intention of keeping ETH for the long-term.

What do you think about the problems mentioned in the following article?
https://medium.com/@muneeb/the-road-ahead-for-ethereum-b5b090bcd1a

Some of the mentioned problems haven´t been solved by some of the brightest minds
in computer science in the last 30 years. What makes you think that Vitalik & the rest
of the Ethereum developers will be able to find a solution for these issues?

Furthermore, it is also debatable, whether Proof-of-Stake can actually
work in the long-term.

I really like the layout, too.

However a few things are not that intuitive to me.
E.g. a green progress bar with 100 % is displayed under the market information
of a sports market. What exactly is this progress bar indicating? I haven´t placed
any bet and am just looking at the market.

Besides, the homepage states 0 % fees for dice. Does the dice game at Fairlay
actually have no house edge?

The problem with Shapeshift is that the fees are multiple times higher than at Bittrex.
It is getting increasingly difficult to open an account at an altcoin exchange without having
to verify your identity.

-Bittrex requires verification
-Shapeshift and Changelly have too high fees
-Poloniex support is terrible and you have to wait several weeks for simple requests
-Liqui has scam accusations against it
...

Which altcoin exchange is reputable, can be used without verification and has acceptable fees?

You can easily export the reports (e.g. as CSV) and build an Excel sheet
that creates nice summaries for you.

It is really not that hard once you have invested the short time to set up
an Excel sheet. Afterwards you simply export the reports as CSV and add them
into your sheet.