It shouldn't and it doesn't.

Mining Bitcoin on Mars is totally infeasible, as almost all blocks mined on Mars will be orphaned by the time they reach Earth. I have talked about a solution before:

Two users cannot have the same IP address simultaneously, though if someone connects to the network after you disconnect, they may be given your old IP address. Note that this applies equally to both wired and wireless networks.

Bitcoins are not sent to IP addresses*. Bitcoins are sent to Bitcoin addresses, which represent a cryptographic key. Only someone with the private key to that address (which is stored on the owner's computer and is never transmitted anywhere) can create a transaction to spend those coins. Bitcoin transactions are cryptographically signed to make modification or forgery impossible.

Privacy, however, may be an problem if others can monitor your Internet connection. Bitcoin-Qt can be run over Tor to avoid this issue, however MultiBit cannot (as far as I am aware).

*There used to be a "pay to IP" feature, but this was removed long ago due to how ludicrously unsafe it is.

No, it will not affect your safety or privacy at all (unless, of course, your computer is connected to the router insecurely, eg, over open WiFi). A router will make it easier for you to connect multiple computers, but that's all.

And, of course, you have to help him out because he's "your friend". I mean, that's what "friends" are for, right?

Until BitStamp gets a subpoena from either the cops trying to trace the dirty coins, or the taxman trying to trace where the cash came from, at which point the connection between the two will be revealed.

And if the bank asks him for the transaction ID of the winning wager, he'll be able to provide it, because he was smart enough to plan ahead and send a small amount of coins someplace prior to receiving the larger payment? If not, he doesn't (just) need a mixer, he needs a shady accountant to help him come up with a more believable story. For a list of qualified shady accountants in your area, please contact your local Mafia representative.

Don't worry, there's no possibility of confusion. Nobody under the age of 50 has ever used the word "mill" to refer to a fraction of a dollar, for obvious reasons. Hell, it won't be long before young people start asking their parents what "cents" were.

She's probably more likely to call them "mills", since she is old enough to remember what a thousandth of a currency unit was called, back when that was actually worth something.

Exactly why would you want to know if such a bizarre and nonsensical thing is possible? I smell an XY Problem.

No, but a half is, just like 1000 is not one unit, but a kilo is. One kilo, two kilos, one half kilo, and so on.

But that's still one unit. A half is a unit. I have two half dollars. That makes one whole dollar. Simple.

Because block timestamps can be inaccurate (either maliciously or by accident) and there's absolutely no way to verify when a block was really mined (and thus how long it has been since the last block). For example, say it's been twenty minutes since the last block, and then you receive a block with a timestamp a few seconds after the previous block. Was it really mined a few seconds after the last block, and you were just late in receiving it due to network lag? Is the miner deliberately using bogus timestamps in an attempt to jack up the difficulty for everybody else? Or is the miner's clock just twenty minutes slow? You don't know. Nobody knows. Fortunately, nobody needs to know, since Bitcoin doesn't care how long ago the last block was mined, and everything works as long as the majority of miners are keeping reasonably accurate time.

I thought the first one was a bear trap?

This is the cause:
bitcoin:12WWoWbnNCPcGegxvkcgvMEKfsm1VfjJda?amount=5.149e-05&message=Cuz%20my%20random%20babbling%20is%20worth%20half%20a%20two%20cents%20worth

Bitcoin URIs do not support scientific notation, and I don't know why Coinbase expected that to work. Bitcoin-Qt (rightly) gives an error when trying to parse this URI.

It's okay as long as you don't inhale.

It's got nothing to do with Mt. Gox specifically. LetsDice periodically scans the blockchain for new addresses and send a satoshi to them as advertising (at least, I assume that's why they're doing it, otherwise I have no idea). They don't even have the courtesy to pay a decent transaction fee.

"Half" being the operative word.

You're the one who's got to relearn their chemistry, if you don't know the difference between a mixture and a compound. Air contains a mixture of oxygen and nitrogen, meaning the two elements are not chemically bonded to each other. Water, on the other hand, is a compound, meaning the hydrogen and oxygen are chemically bonded. That means it's impossible to separate the two without breaking the chemical bonds, and that requires energy. That's why combining hydrogen and oxygen in the first place releases energy. The energy released by combining hydrogen and oxygen into water is the same as the energy required to separate water into hydrogen and oxygen. The same. Not more. You can't produce more hydrogen from water than you're consuming, so if you want to produce more hydrogen, you need an additional source of energy. In fact, you can't even produce the same amount of hydrogen as you're consuming, since some of the energy is wasted as heat and the rest is being used to power your motor.

You don't know as much as you think if you think perpetual motion machines of the first kind are possible. No such claim was made in that video.

Do I need to slap you harder? The fuel cell produces water as its exhaust, but it requires hydrogen gas as fuel. I'm talking about the gas. Where do you get it from? You get oil from oil wells; you get natural gas from gas wells; you get water from water wells; but there's no such thing as a hydrogen well. So where do you suppose hydrogen comes from? Almost all hydrogen gas on Earth comes directly from fossil fuels, in a process that produces large amounts of greenhouse gases. The small amount that doesn't come directly from fossil fuels is produced from water in a process that consumes a vast amount of energy, which means either fossil fuels or nuclear power, since there's nowhere near enough renewable energy production to meet industrial demand for hydrogen. There is no clean, renewable source of hydrogen gas in sufficient quantities to use as fuel.

Oy. *dope slaps Lethn*

I know how hydrogen fuel cells work, and in fact made no claims whatsoever about them (other than that they're fuelled by hydrogen). I'm making claims about hydrogen gas, of which you will notice your video was careful to avoid explaining the byproducts of its production. Seriously, if you think hydrogen can be extracted from water without consuming more energy than you can obtain by reacting hydrogen with oxygen in a fuel cell, then I have a bridge I'd like to sell you.

"Powered by renewable energy"? Huh? Hydrogen fuel cells, in case nobody figured it out, are powered by hydrogen gas. Hydrogen gas is a substance which does not exist naturally on Earth (except as trace atmospheric gases), and must be manufactured artificially. The most common industrial method for producing hydrogen is reforming methane (similar processes are also used to produce hydrogen from other hydrocarbons (fossil fuels), but methane is the most common), which (besides producing greenhouse gases), is pointless for producing fuel for use in cars because methane is already a perfectly suitable alternative fuel for car engines. Using that methane to produce hydrogen wastes energy resulting in even more greenhouse gas emissions than simply burning it as fuel directly.

The other way of producing hydrogen gas is by electrolysis of water, which isn't commonly done because it requires vast amounts of energy, and if that energy comes from fossil fuels, you have exactly the same problem, only many times worse.

Hydrogen is not a renewable or clean energy source. It is more economical than other fuels in certain applications, but it is not a solution to either dependence on fossil fuels or greenhouse gas emissions.

Trying to time the market is a fool's game. I just sell a portion of my coins whenever the price goes up. The higher the price goes, the more I sell. Then when the price crashes, I point and laugh at everyone who tried and failed to predict it.

The "bastards" part. Everybody is greedy, but most people are also bastards about it. And that's terrible.