Well, it seems Electrum doesn't like fun.

They don't allow it because, hoping that Bitcoin will become common use money, there will be a huge effort by hackers to break into users accounts.
This situation will be associated with the fact that the common user usually sets too weak passwords. This would happen with the seed as well.
But then again: as it's commonly use to force users to put caps and numbers in passwords, other mandatory rules can be added when generating a seed.
And I'm pretty sure I demonstrated that a user generated sentence with the rules I set up is more difficult to break than a random generated seed of 12 words without caps, numbers, punctuation, generated from some much used dictionary library... and there's the additional feature that you can easily remember your sentence.

Seems to me like you people want to refuse the reality.

Anyway, after thinking well around all this, I'm definitely sure that a sentence:

- more than 100 characters
- unknown language
- possibly with invented words
- possibly with grammar errors
- with caps letters
- possibly with numbers
- possibly with punctuation.

is more secure than:

- always-english
- common dictionary
- no caps
- no numbers
- no punctuation

randomly generated seed of 12 words.

AND it's much easier to remember, thus giving an actual chance to many users to just hold the sentence in their brain and nowhere else.

What if my sentence was written in... italian? (it is, actually)
Should a hacker implement several languages grammar?
I still think we are going a bit too far in the paranoid field here...

What if my sentence is written in... a dialect, of any language?

Also keep in mind there's quite some people that CAN'T write correctly.
Just to stay on the english side: many mistake IT'S with ITS, HIS with HE'S, YOUR with YOU'RE, and much more...

You can 3D print a ring and stamp the words inside it, just an idea

Completely agree on this.
You can try guess my sentence, but you never know if the first 3 words are ok: you will have to go with all the sentences that can be realized anyway. Still huge work.
Also note that my sentence is 140 characters long and INCLUDES PUNCTUATION, thing that the random generated words do not.

But now I throw another dice on the table: HOW LARGE IS THE DICTIONARY USED TO GENERATE THE RANDOM SEED?
Have you thought about a hacker that knows there are maybe 10 or 12 available dictionaries online and uses them to generate his sequence?
Now how QUICK would that be? Or anyway, QUICKER than hacking my sentence, with EXTRA INVENTED WORDS that the commonly used dictionary hasn't, with PUNCTUATION, that the random generated seed doesn't put in for obvious reasons, with CAPS LETTERS, that the random generated seed doesn't put in.

So, is my request so bad after all? I really don't think so.
And as you force the user to learn 12 words, you can force the user to generate a sentence that is SO LONG, contains SUCH CHARACTERS like at least 2 or 3 cap letters, and at least 3 punctuation signs.

I'm still on my position with random seed:
1) very few people will learn the seed by memory.
2) I have very good memory (tested) and IQ over 140, and still I didn't want to waste energy learning that sequence of words.
3) limited dictionary probably easily exploitable by hackers
4) people will write those words down somewhere.
Result: the seed is out of the user's brain.

User defined sentence seed:
1) easier to remember because the user can generate a sentence of his/her will.
2) harder to break: no words from more or less know dictionaries, caps letters, punctuation, invented words.
3) less people will write down the sentence, and even then... it's just a sentence, maybe a sentence on a diary, nobody could spot it if it's well hidden in plain sight.

Maybe I'm wrong, but I think we are a bit on the paranoic side of the matter now.

You can search a word like Jeenee: if it brings less than N results, you can be sure it will be in the last positions as a tried password term. Or even just passed altogether.
Also, the originality of that phrase doesn't rest on a single word, it's just ONE additional measure of security. The phrase itself is all original, or at least self produced.

Also on your assumption "the next word has to be an adjective or a noun" the paranoic is powerful in you
It's not wrong what you say, but it's a very complex programming matter imho.
I could have put Jeenee, which is a name, following in there, no nouns or adjectives or anything. Or I could have separated the adjectives with commas. Or not, no commas. As you can see there's more options that you think. Screw jumping one in your hacking code, in you can let it search up forever.

But I want to consider another factor, that I think many people forget: time.
How many tries can you do in one second?
I mean, you have the best connection out there, and you try and try and try to hack into one Bitcoin account with false credentials with your hacking routine. How many tries can be done PRACTICALLY?
NOT theorethically. PRACTICALLY.
So don't bring up IBM supercomputers, and imagine a common hacker, with common CPU power, that wants to hack a common person address.

Thank you.
But there's a thing I can't understand: is it another coin, so I have to buy it, or is it working on the same blockchain of Bitcoin???

Bitcoin dropping to hell again... and I don't fuckin know what to do.

How to switch to XT?

As you can see in this scheme (sheet 2), the highest density of venues accepting Bitcoin are in Tampa and Kansas City, both USA.
In general, USA also has the highest number of users and venues on all territory.
Despite intuition, poor countries are not the first users that will gain access.
Poor countries have problems in buying a smartphone or a pc.
Other factors are more important, like tech savvy percent of population in example (that's why US is on top, together with Europe and other country with good income and instruction).
But I think that there will not be a real "first nation" adopting Bitcoin.
It will be a slow and steady adoption together in USA and Europe first probably, and following other countries like Argentina, Brasil, Mexico, countries that are not too poor but not rich either, and that have problems with their currency. The ones that are at high inflation but where population CAN actually buy a pc or a smartphone without collapsing.
A good case to examine is Greece: it's in Europe, it's not too poor, but despite this Bitcoin adoption in there is very very low. I think this is due exactly to poor pc penetration in the country: people are afraid of this "computer money" they can't understand, so they need more bashing before go and learn what Bitcoin really is.

Can you imagine what could mean for ANY cryptocurrency when Google would declare to be integrating one in its systems?
That would probably mean a 300% value boom in few days.

Ye well, I just put my address as a QR code in FB profile, so what?
That's my official address.
I can make thousands, as you should well know.

I agree. And the same goes for most altcoins: they will be wiped out in some months or couple years.

Bitcoin IS the STANDARD.

Implemented in thousands and thousands of websites, accepted as well, it is the most widespread crypto, and it will remain like that.
Population inertia is a LARGE factor in money adoption.
Bitcoin blockchain buffer size will be changed when it will be needed.
Natural selection: XT will pop soon.

The fun thing is, when XT will fail, there will be a sudden bump back to Bitcoin that could invite dubious investors 

Can you make a stand alone executable for Win? 

They quite changed their vision eheh.

Anyway, I don't really think Ethereum will crumble to death.
Instead, my opinion is that there are good chances it will REPLACE Bitcoin completely.

Samsung partnered with IBM to insert the Internet of Things in the Samsung things.
You can see this here: https://www.youtube.com/watch?v=U1XOPIqyP7A

This can easily mean that the next Samsung Galaxy will have an Ether Wallet preinstalled.
And subsequently this means that MILLIONS of people will have an Ether Wallet in their smartphone, either they want it or not.
And subsequently this means that there will be MUCH more advertising about Ethereum than of Bitcoin.
And subsequently this means that developers and producers will put Ether automation systems into their machinery/services/automatic distributors.

Imagine you go at a bar now and pay with Bitcoin.

Now, imagine in 2 years you go at a bar, and you and your barman have a Samsung phone.
You can pay him in ETH.
It's TOTALLY, COMPLETELY predictable.

Also, consider that IBM will probably sell its system (featuring Ethereum, BitTorrent, etc) to other large producers.

Hey, don't need to mention the advertising Samsung WILL make about all of this, right?
I can see them stamping the Ether logo everywhere... not the Bitcoin logo.
This is kind of sad... but I think there's good chances it will go this way.

I'm seriously thinking if Ethereum is going to replace Bitcoin in just 2 years... and if Ethereum is the cryptocurrencies killer app.

Thank you!