How will new nodes verifying the first block of the new chain know what all the starting balances are? They can't just check the last chain because they aren't going to download a copy of it in the first place. What if someone makes a first block of a new chain giving themselves a million extra coins? How will the nodes know that they are or aren't rightfully entitled to those coins without seeing transaction history?

The miner that created the block is entitled to 12.5 BTC plus all of the transaction fees for transactions in that block. So, the difference is transaction fees, payments from users to miners for the miners to include their transactions in blocks, confirming them.

We sure are getting destroyed against bitcoin here, but I'm not really disappointed - we're all a little more diversified, and I keep an eye on altcoins because of it! Plus we're still making returns relative to USD here.

We might have picked one of the craziest 10 month periods we could to do this experiment! 

Due to the recent bitcoin price rises, I have waived all late fees on this loan. Furthermore, it has been paid in full (BTC0.006) by a forum user and the account's password has just been changed to what it was before I secured it.

A lot of people miss the fact that you can sign messages offline with Bitcoin Core without needing to sync the blockchain. It's very easy to do, it's just in the File menu. Additionally you do not need an internet connection which is important for cold storage. You just need a way to get Bitcoin Core to an offline computer (e.g. a secure flash drive).

This loss would have been much less severe if NiceHash wasn't so greedy as to keep the minimum withdrawal so high (BTC0.01). Seriously, $100+ minimum withdrawal?

Are we looking at splits like BCH too? Doesn't that technically fall under the airdrops umbrella, since a massive number of people were credited with them? Because, I don't really mind, all those are doing are moving altcoin money into new altcoins that you and I suddenly already have some of, which we can sell for bitcoin dividends to be reinvested!

Dude, congratulations! I cannot imagine the emotional rollercoaster you must have just gone through!

That said, please be careful! This is $250,000 so any mistakes are unacceptable! I hope you put those coins on the exchange to sell them and not to store them, because exchanges are notoriously bad for long term storage!

If you know all of the characters, and the exact length of the password, then you really only have to try permutations of those characters until you get it. That sounds doable. If you're not certain of anything, though, it may take much, much longer, maybe even warranting going through wallet recovery services.

You were both confirmed

The transaction paying to 1KMXQWRo3iCSVRvY9VWEqTVcD31G8v4wjN has already confirmed and is irreversible (that is to say, it will never be rejected and is final). If you lost the private key to the address, the coins are probably permanently lost, unless you can find a copy of that key. The unconfirmed transaction spending the money from that address will never confirm as the other inputs to the transaction trace back to outputs with confirmed double spends.

I suggest thoroughly checking through all of your wallets to ensure that you have not overlooked this address, if it was yours to begin with.

I did not see that the parent transaction had a confirmed double spend. Usually blockchain.info says (Spent, Spent) in that case instead of just (Spent). Maybe that isn't happening because this transaction has children?

Disregard what I said in my last post. 1KMXQWRo3iCSVRvY9VWEqTVcD31G8v4wjN is the recipient of 0.03918896 BTC. Try exporting the private key of 1KMXQWRo3iCSVRvY9VWEqTVcD31G8v4wjN and importing it in Electrum.

A transaction sending the 0.05669711 BTC back to yourself with a 0.00104154 BTC fee should do the trick. You have 3 unconfirmed transactions plus this new 4th one that you have to pay for. If your wallet won't cooperate with you anymore, you can try to use coinbin to make the transaction from scratch. Go to New->Transaction, and paste your address in and click load. That should find your unconfirmed input that your wallet may be ignoring. Then paste your address in as an output, and for the amount put 0.05565557 (the full amount minus the fee). Submit the transaction and then go to the sign tab to sign it with your private key making it official. You can do this part offline if you want, considering it's a lot of money. Then broadcast the transaction. This will set all the transactions to 160 sat/b overall, which in the current fee economy is workable.

You could alternatively just wait it out. The transactions aren't lost or missing, they're unconfirmed and will confirm eventually if no action is taken in the coming hours/days. As long as you have the private key to 18bCTiTXLVajxnQn48VPmGGrVx2WeLWMKW, you will receive the money in the absence of any more double spends.

Nothing yet. Though it seems absurd someone would do this for BTC0.002, don't you think OP would get more by trying to find a buyer?
If we never hear from OP again then I will just neg the account and move on.

And you might be in the wrong thread. This one is just for a single loan.

Because then you can short sell, or go long on bitcoin, without needing to get out of other altcoins, since you'll get the full amount back once the loan is repaid, regardless of what the prices of both currencies has become. Normally if you think the price of something will go down, you would sell, but if you don't have any to sell, you can borrow some, and sell that, and buy it back for less when it is time to pay it back. That's why people use altcoins as collateral.

That stuff is going for $0.057 each according to coinmarketcap, making 20 worth $1.14. Ideally you want the collateral to be worth 120% of the amount you're borrowing, which would be more like $98, meaning $1.14 isn't going to cover it.

Deposit Amount: BTC0.05
Repayment Address: 1TarasQyKwPJRuod6qwh7n8BjMHC49ZNY
TXID: a0cd6b356d92e6d564bbe6afade0ab92a814661b5e8f0b07ce6828c502e875c2
Days Investing: 21

If that were true, don't you think that you, the supposed account owner, should probably change the password to keep the hacker out? Or if you, the hacker, should change the password of the account making it impossible to be retrieved? Neither party changed the password. This doesn't add up, I simply cannot believe this account was used by more than one person in the last 30 days.

If you want that red mark removed, you should pay the amount you've incurred. You've wasted that account on such a petty dispute.

The 0.0032 is due today - for every day late, the amount owed will increase by 4.5%. Extra interest won't start being applied until the day after tomorrow, with today being Thanksgiving and all. Repayment address is the same

According to your profile, that account's password wasn't changed in the last 30 days, and I funded your loan less than 30 days ago.

That token isn't going to be easy (maybe impossible) to liquidate if you default. Not that I think you will default or anything, but for that particular reason I cannot accept it as valid collateral. The Google search results for "XGM token" had this thread on the first page.