i see most people are talking about private trades..

but there are car dealerships accepting bitcoin
http://spendbitcoins.com/places/c/car-dealers/

ok in short
to get 25 bitcoins you need 750petahash(~200million avalon nano's)
so
750,000,000 gigahash=25btc
375,000,000 gigahash=12.5 (halved for easy maths comparison to 100million the avaon nano's
37,500,000 gigahash=1.25 (for 10million nano's)
3,750,000 gigahash=0.125 (for 1 million nano's)
375,000 gigahash=0.0125
37,500 gigahash=0.00125
3,750 gigahash=0.000125
375 gigahash=0.0000125
37.5 gigahash=0.00000125
3.75 gigahash=0.00000012 (one avalon nano is 12satoshi per block)

=0.00001728 per single avalon nano per day
=0.00012096 per single avalon nano per week = (~$0.05c per week)

remember after 2 weeks the difficulty jumps so expect less then 5 cents a week after 2 weeks EG 4cents

meaning
2x5c
2x4c
2x3c

in 6 weeks you have made....... drum roll........ 12cents

so now you know its not worth buying a nano for bitcoin mining, maybe worth trying it on a crappy pump and dump altcoin that has less competition.. then atleast you will not be fighting the equivalent to 200million times your size

as for antminer s3
=0.00001467 per block
=0.00211248 per day ($0.93cents)
=0.01478736 per week ($6.54cents)

but remember difficulty will make the reward smaller every 2 weeks
estimated
2x$6.54
2x$6.00
2x$5.50

after 6 weeks you have mad... drum roll.... $18.04
as for electric
average price per kwh is 12c
an antminer s3 is sucking up 4c an hour
=$0.96c a day
=$6.72 a week

what you dont realise is that while antminer is selling the s3 to consumers for $300. they are making it for less than $80
so when you buy an antminer.. they deliver you 1 and thy keep 3
which means no upfront cost from them as you gave them 3 free units..
and now you know why the chinese are taking over the mining race and selling units that will never break even.. to kill off their competition while that same competition is funding their free equipment

well the maths is there..

sorry but propagation is not an issue.
if you can watch netflix then you got no worries about bandwidth

eg
2mb blocks = 12mb an hour
4mb blocks = 24mb an hour
8mb blocks= 48mb an hour

netflix SD = 1000mb an hour(20x-80x more bandwidth requirement for netflix compared to bitcoin no matter what block size proposal goes forward )
netflix HD=3000mb an hour(60x-240x more bandwidth requirement for netflix compared to bitcoin no matter what block size proposal goes forward )

and 33million people dont seem to be complaining about bandwidth issues

+1
all 15million coins are not on exchanges
only 30,000 are and most get swapped atleast 3 times to show maximum trade volumes of 90,000.

so of the 30,000 coins or less active on exchanges.. the other 14,970,000 dont really affect the supply or demand.
so it doesnt matter if they are hoarded. or lost in a garbage site or forgotten private keys by satoshi, hal finney, sirius and the other original crew

no regulations recently
but one guy getting prison for selling MDMA and LSD which he obtained via silkroad
http://www.austlii.edu.au/cgi-bin/sinodisp/au/cases/act/ACTSC/2015/352.html

and it seems that the only real regs are that bitcoin should be treated as foreign currency in regards to income tax
http://www.austlii.edu.au/cgi-bin/sinodisp/au/other/rulings/ato/ATOPRP/2015/prp2015-03/prp2015-03.html

yeo and in 2-5 years a 4tb-6tb will be under $100.. so scalability is not an issue

yep

and a 2tb hard drive for 20 years of 2mb or 5 years of 8mb= $92, not really breaking the bank for 5-20 years storage needs ($4.60-$19 a year)

fact not fiction
1. blockstream devs have already partnered up with mining pools: eligius pool, and btcc.com..
2. blockstream devs have already partnered up with a few exchanges too: Bitfinex, BTCC, Kraken, Unocoin, and Xapo

and once people are told they cant have their bitfinex withdrawals as they are SW liquids and not normal pre 2016 bitcoin transactions.. people will be forced to upgrade just to get their money back. then non upgraded users want to cashout to a xapo card, guess what xapo prefers SW liquid transactions too
so in the end the users have little choice but to convert or be left behind

lauda your a segwit fanboy.. we know it you know it.. now move along

lets talk about the real bitcoin blockchain where signatures are checked and no funny business is going on for the benefit of the few little people..

i said last year 3 options of the direction blockstream could go.. and it seems they want to not increase the block size ever.. force people to use non signatured transactions. then bloat the blocks with 250bytes of data to hide the values spent of each transaction. so that eventually bitcoins blockchain will only hold 2000 tx a block or less of uncheckable data.. forcing people to not use bitcoins blockchain.. but blockstreams sql database known as liquid.

so you can keep pushing segwit all you like.. goodluck with it, see you when bitcoin is ruined

contradict yourself much.

this is why people who are new to bitcoin get so frustrated that they were mis-sold the utopian dream

NFC debit cards, applepay, even banks notes take just a second to hand over.. so its not even worth mentioning the "just a second"
what people care about more is when the recipient is satisfied they will be guaranteed to get the funds, which for bitcoin is 10 minutes+ and a bit of luck

with visa. it has guarantee's that the recipient will get the funds.. making the 'when' less of a concern and not really care if its 1 hour or 2 days.. as they know its coming.

so concentrating on when is less of a problem then 'if'.. and with bitcoin still having malleability issues. the only true way of knowing 'if' is by waiting for a confirmation.

bitcoin really needs to sort out malleability so that the 'if' is not a problem and people can trust that even a unconfirmed transaction will get confirmed eventually, which also means that miners have to stop cherry picking tx's and letting some drop off

60gb for 7 years of data..

i dare you to watch 7 years of tv shows..
i dare you to install all versions of GTA
i dare you to install all versions of call of duty

i bet your more willing to watch netflix or download games 2 times a year

the funny thing is no one complains about watching 60 netflix shows. or playing just 2 games.. but somehow something that is worth more to them then $50 worth of subscription or gaming.. EG holders of atleast 1bitcoin.. cry that its too much to handle.. 60gb of data

yes its a hassle downloading at first. but once its done you wont even notice it and wont care that its in the background for the next few decades.

inshort if you have GTA or call of duty on your hard drive, and happy to have it.. then you have nothing to cry about

i wouldnt rely on fingerprint for long term holdings of large sums

EG
get a papercut leaving a scar.. and it wont show up as the same print
abrasions
blisters

all of which can change how your finger appears to a scanner..
thats why banks dont use fingerprint technology.

its ok for hobby use for things that are not important, where your phone is backed up and can reset it when you have issues. but not to be used as a level of security where large funds are locked away.
fingerprint id is also being thrown out in court more often now that they realize that its not 100% accurate.
so maybe best to stick with pin numbers

HD seeds are more for convenience rather than true bitcoin private key security.

lets say there are 12 word seeds and there are 1 million words in the english language.

the odds of someone RANDOMLY finding a combination is small.
million x million x million x million x million x million x million x million x million x million x million x million
=1 in 1000000000000000000000000000000000000000000000000000000000000000000000000 chance
even at 1000 combinations a second is only 31536000000 per year which still leaves
30000000000000000000000000000000000000000000000000000000000000 years

but, because words have structure. such as vowels and consonants it means that its slightly less random.. in human terms but even more less random in computer terms.

lets say 12 words of 6 letters long
applesorangebananapeanuttomatotissuesneezetriplesecondpriesthandlevalves
is not as random as
a9g6k3x6v3d7m2u5b7s8f9g5p6l2n4wj1aks6osc5gtq8lcu4wqk9xs3btald3fiuy9sl

because seeds dont use numbers there are only 26 character variations per byte instead of 36, and also knowing each word has vowels. allows the slightest of risks to reduce the randomness by smart people having pattern generators that that can shave off a bit of hashing requirement by knowing that a z doesnt appear much in words. or that a Y doesnt really follow an I but can follow a E quite often

but dont worry, even taking in some fancy english literature rules to reduce the hashing. it will still take
10000000000000000000000000000000000000000000000000000000 years+


but with that said
bitcoin core never is, will be or wants to be the user friendly version for grannies and teenagers to use.. its aim is 99.99% network security. and the ability to actually do transactions using bitcoin-core through a GUI is a side issue. usually for testing and debugging.

so putting fancy features into it is not their priority.. thats something other wallets can do for user friendliness so that bitcoin can contentrate on network security while other play around designing user friendly wallets

well cryptsys address is now a PO Box

poloniex address is the agency that can incorporate businesses for $49

btc-e dont even want to reveal where they are located

exchanges do not really make it easy to find the real life addresses of companies to send legal stuff too

whats the transaction ID
are the transactions confirmed.

is yes then the recipient has received the funds and is lying to you.
if no then you can either wait for the network to drop the transaction, or resend it by getting the raw transaction and pushing it again

get your seed/privkeys from electrum and use a different wallet

fast no

store of wealth yes

tracked , only prevention if you don't publicize a bitcoin address to a known username which can then be linked via an email or ISP

as for 'governing bitcoin'.. no
im all for consumer protection and easing justice for people to get police to understand how to slap scammers with a wetfish, but governing bitcoin can do more harm then good.

for instance everyone hates gavin A proposed XT. but what could have happened was instead of moving off and treating it as a separate project giving people the freedom to choose. he could have overruled the bitcoin-core github and implemented it directly.

so im actually glad he put it as a separate project and allowed freedom to choose rather than using his governing powers at the time

the problem with backing up a wallet.dat. is that when you next send a transaction. it creates a new 'change' address created randomly and stores that to the wallet.dat.

making the backup instantly out of date as the backup doesnt have that new randomly generated change address, and requires re-backing up every time you do a transaction.

with HD seeds you dont need to worry
because private keys are created using the same seed.
laymens(not exact coding so dont judge)

key1=hash(mortalphilosophyvealspeciesporpoises1)
key2=hash(mortalphilosophyvealspeciesporpoises2)
key3=hash(mortalphilosophyvealspeciesporpoises3)
and so on
so as long as you know the seed eg mortal philosophy veal species porpoises    then the program will always be able to append the numberic sequence to get all the addresses attached to that seed