Hi again!

I am going to buy a couple more of BTC, and invest in it on monthly basics. Until now, I am using Bitcoin Core on my local PC and some lightweight wallet on my smartphone, but as I would like to hold bigger amount of BTC for a longer period of time, I am concerned about safety.

My idea is to buy an old laptop, that will be completely offline (turned-off/unplugged LAN devices). I'd use it to keep my private key and sign transaction with. I would communicate with it only with USB stick to migrate signed transactions outside. Private key would be offcourse saved on a paper copy(ies) as well.

Questions:
1. Is this do-able? If so, how can I sign transaction on an offline machine? Which tools should I use?
2. Could I do it with a tablet as well? Do you knwo any tools?
3. Do you see any security issues with this approach?
4. Do you know any tricks, to make paper copy of PK more secure? Less readable?

And yes, I did consider Trezor, but I decided to do it the other way.

Well, I found an interesting thread on reddit:
https://www.reddit.com/r/Bitcoin/comments/2fe3dg/i_sent_out_this_transaction_over_a_month_ago_it/

Over a month...? Well, there is still a long way, before an ordinary, non-IT oriented person will be able to securely use Bitcoins.
My wallet has no option to change anything, but my local currency. There is not even an option to export my private key! I can only check my recovery phrase, and hopefully I can use it somewhere else to get access to my wallet elsewhere.

BTW. This was first or second app listed on iAppStore for a "Bitcoin" keyword - BreadWallet.

Oh Bitcoin, why can't you be more predictable for a normal man 

Thank you for fast and complex explanation!

I can see now what is happening. About one week ago, I received tiny amount of coins (684b) which are yet to be processed (32956d6013d95928ee862e755f144f2676f42c1ee5edba0405c2e4c99d47e5e8) and, to be honest, I have no idea where it come from. But as knightdk said, it cannot be confirmed until previous one will be (6ff132bd00c6a0ab6898b25d04073f6414d8c325a4df1a6f6771bbc7d9dbe6f3).

I was waiting for a new transaction to be confirmed, which I was sure it will take no more than couple o minutes (and I was right). So, I guess, I spent it before it was confirmed, and my not-so-smart wallet made new output, by mixing it with the part of other unconfirmed transaction. The other one, being unconfirmed for days now.

No I have blocked 10000000 satoshi, because of unconfirmed 684 satoshi 


Is there ANYTHING I can do to fix that? Is there a chance, that this transaction will be never confirmed because of too small fee? Is it possible to loose your money like that?

Hi all!

I have a question about how long does it take to process a transaction. I read a lot about it, nevertheless, I am still confused.

There are two transaction in my wallet, that are still unconfirmed. One is very small, 684 satoshi, and it is idle for nearly a week. I guess it is possible for such a small amount. But the one that concerns me more, is 0,1BTC + 170b fee. I sent it more than seven hours ago, it is marked as "High Priority", it is 520 bytes in size, it has a fee, and yet - I am still waiting. Is it normal for such a transaction? Can I avoid that next time?
Transaction id: 9cd909bb8246dd7307b354279b1212f62b2780dfd901d64cea9f6db75f88da8f
My wallet: Bread Wallet on iPhone 4s

If it is normal, then please, explain me how can I pay with BTC in any store/bar, if I have no control if my payment will be received the same day?

Everyone is talking about the change in supply of bitcoins, as there will be less of them showing up on the market. Is it?

First - there is this simple rule on each stock market (including currency exchange): if everyone thinks that price will change in a specific direction, it will go in the other way. If everyone wants to earn on the same fluctuation, no-one will.

With that said, there is other problem. Supply means how much of product is showing up on the market, not how much is being produced/found/mined! Keep that in mind, as miners might be aware of that too. They might be hording their coins until the change of mined blocked size, and then - bah! The will SELL. Therefore, today's supply might not be as big as we think, and tomorrow's might not be that small.

Just saying...