To crowdfund with Bitcoin, there are not many sites out there. However if you want just normal crowdfunding, use kickstarter or indiegogo. For those two though you will need to provide some sort of prize, some incentive for people to donate money.

Just upload a screenshot to any site like imgur and post the link to it.

If you can't put a screenshot, describe what you see.

What do you see? What is the error? Can you post a screenshot?

They should all work. Use 0.11.2, it's the latest.

The key phrase to my response was no one is able to get it from you, which in this case, he is making it easy (relatively) for someone to steal the Bitcoin from him. However as long as he has the wallet.dat file, then he has the private keys and he will be able to spend any Bitcoin associated with the addresses associated with those private keys. Whether the Bitcoin remains there is up to his security, but he will continue to possess the private keys necessary to spend what is left as long as he has the wallet.dat and it remains uncorrupted.

No, you are fine. The private keys are stored in the wallet.dat. They are protected by your passphrase. As long as you don't lose that file and no one is able to get it from you, then your Bitcoin is safe.

If your computer is online when the wallet was created, then some virus on your computer logs your wallet password and sends the wallet file to someone else who can now spend your money.

Say the computer was online (you had to be to download Bitcoin Core) so it got a virus. You make it offline but the virus is still there. When you make the wallet, it records your password and copies the file. Then when you go back online it sends it to an attacker and he just stole your Bitcoin.

It doesn't matter whether Bitcoin Core is presently installed or not, as long as the attacker has the wallet file and your password, the money is gone. To be fully secure, you need to create the wallet and any cold storage wallet for that matter on an offline computer that has never been online in the past. This includes virtual machines since a virtual machine running on a compromised host is just as bad as using Bitcoin on a compromised computer.

Yes but that would not be offline or cold storage. It exposes your wallet to an online system so there is the potential for something to steal that wallet and password and thus your Bitcoin.

Generally you should have one to two periods worth of Bitcoin with the escrow. The amount for each period should be the maximum amount you will ever pay out. This would be that all available slots are filled and every single person posts the maximum that you allow.

Then you can't use an offline wallet. Offline wallets require that you have two computers. You can buy a raspberry pi for $35 and use that as an offline wallet.

This belongs in meta.

To start, you will most likely need to hire a campaign manager to run the campaign for you. One of the best campaign managers is Carra23. You can find people offering campaign managing services in the services section.

You will also need an escrow to hold some extra funds. The escrow is to guarantee to the participants that they will get paid should you decide to run away without paying them.

Oh. That's a bug. I'll fix that at some point.

Edit: it has been fixed.

Yes. It would produce high s signatures which would be rejected by the network.

Yes. There is no need for anyone to know what your master public key is.

Of Course it would. Bitcoin is reliant on Computers and the internet. Without the internet and any way to network computers together, Bitcoin would not be able to function. Anything that is possible to destroy the internet like a solar flare would in the process also take out computers, so Bitcoin would not be able to work.

 Keep in mind that if the internet were destroyed, we would have much bigger problems.

That app is quite buggy and IIRC it doesn't work very well. I also wrote an app (thread: https://bitcointalk.org/index.php?topic=1195830.0) but it is not done yet. It reads and can post, but it is a little slow and the UI needs a lot of work. I haven't had time to improve it yet though.

Hm. I thought it was in the OS, but it might also be in chrome's settings. Try goin to settings and then advanced settings. Under privacy click on Content Settings. Scroll down to Handlers and then click on Manage handlers. If you see anything there bitcoin related, select (none) in the drop down box for that type. That might work.

You will need to be an administrator to do this.

Go to Start and type into the search box
and hit enter. This will open the registry editor. Click on the arrow next to HKEY_CLASSES_ROOT and then scroll down until you see "bitcoin". Then click on the arrow next to that and then the arrows next to "shell" and "open". Then click on "command. On the right side, you should see something that says "(Default)". Double click on that and another window should open. In that window, type
where <command> is the command to start Bitcoin Core. To find the command, go to your desktop and right click on the shortcut that starts Bitcoin Core. In the right click menu, go to Properties. Copy and past everything in the Target text box as the <command>. Then hit OK on the properties window and the other one from regedit. Then close regedit and it should work.

IMO web wallets are bad, especially Blockchain.info. However, if you are intent on using a web wallet, choose one from https://bitcoin.org/en/choose-your-wallet in the "web" tab. That lists several wallets and the web tab specifically web wallets. These wallets are considered good and trustable wallets to use. The site will also tell you some information on the wallets security and privacy. You may notice that blockchain.info isn't there, and that is for good reason.

I have made an update to the site. A detailed post and activity period breakdown is now showed. Activity, posts, and rank is calculated by the site in-house instead of pulling data from Bitcointalk. This is more accurate as Bitcointalk can take several hours to update stats like activity and rank.