use a 2of2 or 2of3 wallet with multisig and two factor.

Even better with an anti tampering hardware wallet talking to a service provider for 2FA for most security

I'm sorry but .. where are the keys ?

Do I have to trust you are not going to get hacked ? Because that's just not going to work and we both know it.

That would be fine if there was no copyright.

GPL use is only useful as long as copyright exist: should it not exist then GPL is not just not useful anymore but not needed at all!

I'd just disassemble what you did and release it as open source again :D

Isn't 80% of world wide used currency all speculation and only 20% used in services and products ?

I'm talking about the trillions of derivatives market ..

That depends on whether you mean "M0" or "M3".

Retail payments are now a little over 50% electronic: http://www.paymentscouncil.org.uk/media_centre/press_release... , so that's bank money rather than paper/metal currency.

Forex trading is huge: http://finance.yahoo.com/news/forex-market-size-traders-adva... : again, held on account rather than actual notes and coins changing hands. That's not even counting derivatives, but derivatives usually net out (for every put option there is a call option) and don't necessarily require settlement.

However, there's enough of a real market and taxation demand denominated in the US dollar that it's not going anywhere any time soon. The ECD made enough of a commitment to Euro liquidity that it's not going away any time soon.

Bitcoin's market cap is still tiny enough that it could be demolished by a single bored FX trader in an afternoon; but there's no real way to profit from that, as doing so would also demolish the fragile exchanges by which you might cash out.

Interesting. Thanks.

Brain wallets should never be used. Even experts fail at picking phrases with enough entropy.

Full stop.

You should be very carefull with your Bitcoin.

I would go with one of the zero trust multisignature wallets because I like 2factor and I don't like the idea of some malware taking the funds away at will when it finds a key in memory.

Warp Wallet has had a 20 BTC bounty on cracking an 8-bit alphanumeric password for a few months now, still unclaimed: https://keybase.io/warp

There are safe(r) ways to use a brain wallet, but it shouldn't be done without understanding the math and the risks. At the end of the day, redundant and physically secure paper wallets will always be the best option.

I guess scrypt makes it much harder in memory requirements to bruteforce dictionaries and famose phrases/documents although still risky with keyloggers.

The most promising web wallet i've seen so far is https://greenaddress.it which seems pretty much like "Electrum" online but with two factor which in theory means a local keylogger can't steal your bitcoin.