Is your cpu maxed? It has to process the blocks too.  Low disk space?  Some kind of firewall problem? How many connections do you have?

Create an account on whichever exchange you're thinking of and see if there's a withdrawal option.  If there's not one then run.  Also Google the exchange before depositing.  If it says they've halted withdraws then run.

Martingale doesn't work at all.  It doesn't matter how much you start with or how small your base bet is.  The odds are with the house no matter how much you bet.  And it's even worse because you're doubling your bet when you lose.  Doubling your bet in a game where the house has an edge can never be a winning strategy.

How can you even guarantee a return? The best you could really do is less than a percent in dollars for a CD, and it's still not instant access to your money.  You could purchase some type of bond, but that's even less access.  10% return, instant fund access and low risk don't go together at all.

Many people, including me, are just terse.  My signature doesn't pay by post count, so it doesn't matter how often I post.  I don't know how people post page long replies, it just never seems to me like there's that much to say.

If you generate an invalid address then you're doing it wrong.  There's no warning to test every bitcoin qt key that it generates for you.  What's different about doing it offline? The only difference is that rolling your own cryptography is always a bad idea.

About $100, unless I'm going to the casino / card room.

If you're in the process of selling the home you definitely don't want to put a "lean" on it.

Are you using stratum?  If not you'll get that error.  You might need to install the stratum proxy to serve stratum to your miner.

Wow, are non-scientists still denying climate change?  I wonder what year it'll be when they learn what's up.  How long did it take until they accepted the world isn't flat?

Don't use a brainwallet.  That's terrible.  Use a real wallet, armory or electrum offline.

It's the n value, you need some way of reading the raw transaction, such as you suggested.

How do you get the revenue? Can you "monitor" the feeds?

Each {} is a list, so you can have as many inputs and outputs as you want.

Which wallet client? If it's for some small alt coin that only provides a Windows binary then the program you need is a compiler.

I'm sure there are old Asics that aren't profitable now, depending on your electricity costs.  But I'm sure a lot of miners aren't concerned with profitability now, but how the price will go up later.

First you need to create other accounts and then loan yourself larger and larger sums of money to gain trust.

Are you 100% sure that the electricity will be free for the next year or so?  Or is it possible you'll be kicked to the curb at some point?
Are you 100% sure they won't break?

There's absolutely no point in using linux and running an encrypted file system if you're going to leave your private keys on a website.  Instead of importing the private key you should just transfer the funds to an address in your multibit wallet or sweep the private key.

Not only does it not increase security, but renaming it to cat.gif increases the likelyhood that you'll lose it, accidentally delete it, forget it's on a USB drive and give it to someone else, etc.