There have actually been people who sold and bought houses for BTC and other crypto's.
I recall seeing one house in Italy being offered for Dash on some other forum, and someone apparently bought that less than a month ago.
On bitify and another bitcoin auction place I've seen houses for sale priced in BTC and another cryptocurrency, as well, one of those was in the US, the other house was either in Germany or Austria, I forgot which.

And seriously, as someone else already pointed out with an example of a gold ring... it doesn't matter which form of trade is agreed upon; fiat money, Adam West's worn socks from his last time in the Batman suit, six camels and a goat, a rare misprinted stamp on which Queen Elizabeth has a third boob... bottom line, as long as buyer and seller agree on the exchange of the house for -whatever trade item was offered/wanted in return- and all the paperwork involved is done, it's a valid deal.

... .... and here I thought it was about someone making money by stripping cables.
Which, by the way, is an idea that I'll be copyrighting very soon, just in case... 

But all joking aside, yeah, it's not that hard to set up your own site with a cam, and a link/button with the right URI to have people pay the ammount.
Heck, you could even just set up an IRC channel or some chat messenger, and advertise that, using that as some form of "lobby" where you could pick the clients you want, maybe discuss payments and what they're expecting.

Heck, you could even team up with a few other freelancers so there'd always be someone available to do a show, thus causing more choice and opportunity for the clients, meaning a bit more client retainment, as well as opening up more ways of making a bit more for the entertainers.
But I might be thinking a bit too far ahead on these things, so let's just stick with the basic things.

(edited to correct a typo and add a smily)

I'll gladly jump into this, but on two conditions.

1. Before I hook up my 20 verified Paypals, you need to send me $100 per account, in BTC or unmarked Ethiopian currency.
2. You send me pics of your hot sister.

...
...
...
Yeah, I thought so.... not happening 

First off, I did include some warnings of what could go wrong by creating a fake site to trap this fool; I've made that part bold and italic in what was quoted from me.

Second, it wouldn't be a phishing domain; well, unless you want to reason that the intent of finding out an IP this way is phishing, in which case a bunch of legit tech giant companies such as Google, Microsoft, Facebook and their ilk would probably very much like a word with you.
You're not stealing any random person's credentials used for logging in through this domain; you're merely confirming that indeed this specific person has bamboozled your credentials and has the intent of using them in illegitimate ways, for illegitimate purposes.

Third, uhm yeah, exmo creating that fake account, totally not technically in the same category as doing it yourself on your domain... but actually, I'd very much like it if they DID go to such lengths to help bust some crackerjack skidmark; they won't because likely they don't very much enjoy the possibility of it backfiring on them, as you say, but I'd actually applaud them for taking such a stand and helping bust the thieving idiot.

Cheapvcc, cheapvccs, openvcc, and a few more domains - they all are part of the same scam operation.
Take your money there and you're getting screwed, possibly you may also unknowingly be donating to some dumb-ass terrorist.

Knowing is half the battle, now you know, so stop feeding these tards your money.

He means he felt like you wouldn't be a scammer, as you already paid him, back then.
At least that's what it looks like to me.

Yup, an obvious accident in the human genepool somehow slipped past Darwin's checks.
Joel_Jantsen has the right idea, but maybe I can add a little zing to it.

- Get a cheap .com domain, say "exm0.com" (purely an example, make it something the fool won't recognize to soon) and set up a site that looks like Exmo.com.
- Make sure that he can use the fake info to log in on it.
- Also make sure you have a script that logs his IP and other info for you (browser/user agent, system language, all the good stuff).
If it's a really good script, it can even check if he's on a proxy/vpn or not (though they won't always show, but a lot of them still do show).
Take all that info to law enforcement (unless you got your doge/other coins by more nefarious means, in which case, try to find out yourself where this idiot bumbag is really operating from).

And whatever you do, don't go the route of using the fake site to put any nasty stuff on his computer.
For starters, you don't know his actual system (android? Windows? Mac? Linux? Atari 2600?) so you can't be sure any worm/trojan/other digital herpes would work.
Secondly, you can't be certain if he uses his own computer or if he tricked someone into letting them use theirs.

Honestly, ANY site - darknet or clearweb - is just as trustworthy as any plasce that isn't within arm's reach.
Anywhere that someone can make a quick buck by stiffing other people, regardless of whether it ends in .onion, .net, .com or .Ilooklikethehamburglar will be used by such people to do the most stupid and most heinous scams.
The fault lies not with any part of the internet, the fault lies with people being scumbags.
If that wasn't the case, then there'd be no "scam accusation" subforum on any site on a .org domain.

There's really two parts that make this a problem:
1. Paypal.
2. Your money.

Paypal loves peoples' money.
Paypal doesn't like people.
That slogan they have, about "new money"?
That's them, looking at peoples' bank accounts and going "Ohhh NEW money!" like James Woods goes "Ohh piece of candy!" in two or three Family Guy episodes.
The BTC exchanging gave them a legit excuse, them asking you about it is just a bit of courtesy, a bit like "do you like strawberry- or raspberry-flavored lubricant?" before they have your way with you.

Again, look at part 1; I know you have, but just for reference:
The bold, italic part, that implies you having access to the online thing.
And that's where you can also fix/tinker with/combobulate/dissemminate/alter/go Freddy Krueger on stuff like passwords and whatnot.
Granted, it won't be that easy or even possible for all those online banking things/Skrills/whatnots, but there'd still be a wealth of info in there.
Previous owner logged in just two days ago?
You'd be seeing that, and know that chances are he's waiting to bamboozle you internet-style.
Previous owner's last log-in was weeks or months ago?
Less chance of him pulling a fast one on you.
If you're willing to take the word of any bank clerk that your money is 100% safe in that bank, then you can do the same for any other person selling stuff or services... because the only way to have 100% guarantee in money matters, is to close your eyes and imagine getting that big lottery prize - unfortunately, while getting it that way is a 100% guarantee, it's kind of hard to spend those lottery winnings anywhere in the real world...
Even the baker can give "only" 99.999999% guarantee that his bread will not kill you, and he'd still be taking a gamble of a few percent on that, an educated guess-type gamble based on his previous experiences, at best.
At worst, he's that mass murderer who hasn't been caught yet, and that's no almond in that almond-flavored pecan pie he just made you taste a slice from... yeah, I joke about that in an over-exhaggerated way, but unless you and the baker and the bank clerk came from that same womb, went to the same school, and celebrated all your birthdays together, chances are you don't know them well enough to trust that their 100% guarantees are really 100% honest.

And now that I've made you put on a tinfoil hat whenever you go for groceries, I'll repeat the point; if you can see online that no second card was issued or any other funky stuff went on, then chances are that you tinker with the password as well... though in my earlier statement about that I forgot to add that you'd probably need the email address for that, too... or convince them that you as uh... the uh... legit owner no longer have access to that email address.
Not very common, but not entirely uncommon either, people do lose email addresses and even switch providers without thinking that they might need that stuff for the bank.

Edit for buybtc1 - I tried replying to that pm, but it said I was trying to soon.
I'll go do some groceries (takes me between 30 minutes and an hour) and then I'll send my reply.

I can provide at least a partial answer:
1. For at least some of those things, you'd be able to see online if a secondary card would have been issued - and at least some of those that were offered won't let secondary cards be issued without disabling any previously issued cards, so either your card would already be dead or the other guy's card would be dead.
2. Seller mentions in this thread that he bought these from people who worked in the EU and used them to receive wages, but no longer had use for them when they left or whatever... whether that's true or not, I don't know, but that was what the seller mentioned.
3. If you deposit money on it, then that inadvertantly implies that you are the one with the live card, see part 1 of my comment, so at least in some of the cases any previous owner would not be able to just get to the money you deposited.
In the case of Skrill, at least, there is a bit of a snag I think... with Skrill they might be able to try and take the accounts back, but most likely that'd result in Skrill freezing the account for investigation, so neither you nor the previous card owner would be able to get to the money.
If the previous owner is in another country than where they opened the Skrill from, and you are on an IP close enough to match the right country, then there's a bit more chance that Skrill considers you to be the legit owner, though there'd also have to be the security questions and stuff - and you'd probably need to have access to the original email to change password/security questions.

I don't know about the actual bank cards, I never messed with those myself... maybe something I should try out, just for educational purposes... hm... then again, I don't like the thought of possibly messing it up and becoming inmate 74758's new prison bride :p
Gah, no guts no glory, I'll just do some careful research before deciding...

Edit, because I forgot something:
To the one asking about how the cards could be used if the names do not match; seller already answered, but I'll add that it can be a hit-or-miss situation.
Some banks do check, some don't, and some do randomly/sporadically but not all the time.
I know at least one time, where I worked for a temp agency which messed up... they sent my wages, with my name, to the wrong bank account; the owner of that bank account never replied to anything, my own bank couldn't just get it, the temp agency's bank tried to retrieve the money but couldn't because the other guy already cleaned his account out and never replied to anything... pretty much I was left holding the bag on that situaton, and it was a paper bag, with a flaming turd in it.
But I've also heard of other banks that do things differently, that will check everything in detail all the time, and some that do sporadic checks.
The bank I'm with now is one of those that don't always check, but still do check plenty of times to make it risky enough for anyone trying to mess with such things.

My business idea (won't happen, because apart from massive funding it'd also need a whole bunch of laws in a whole bunch of countries to be changed or dropped):
- People tell me their problems, and donate however much BTC to any truly charitable cause that they feel it's worth having my ear.
- I then analyze their problems and figure out if other people are at the root of their problems.
- If indeed other people are at the root of their problems, I call in a bunch of goons and we hunt down those at the root of the first person's problem.
- These goons are the true customers; it's me organizing a human hunting trip... the person(s) at the root of the first person's problems are the prey...
- From the massive profits, I buy a spaceship and after each hunt I lay low on some spacerock, where I'll put up massive statues in my likeness so the galaxy knows what a great guy I am...

... okay, now the serious answer; if I had massive, truly massive funding, I'd buy up small islands and sections of sea off the coast of African countries... build up these islands (in case of buying up sections of sea, they'd obviously be artificial islands) so there'd be fertile soil covering these massive water treatment plants.
Whammo, African countries getting cheap/free access to clean water, diversification of their foodstaples, and in return I'd get rights and assets to build up a bunch of solar panel "farms" across that continent which would power a pretty sweet computing facility that I'd then rent out relatively cheap to scientists, and if any computing potential remains, well, I'd use that to honor the true purpose of mankind inventing computers and internet... oh, the ammount of "squid on sheep" action I'd be watc-errrrrr I mean... I'd donate any remaining computing power to worthy causes that further the development of mankind as a whole.

Yeah, pretty sappy and all that, and it'd require a bottomless pit full of funding to keep it running, but that's what I'd do if I bumped into a lamp with a genie and wished for an unlimited supply of money.

You say you applied a bug that you found?
Ahhhh.... yeah, that'll work.
Just the other day I deleted my Windows folder, and it confused the smackdaddy out of Paypal so they dropped $5000 in my Paypal too.

But seriously:
It is possible to occasionally log into/use Paypal with IP's from outside the country, some folks travel and sell/buy stuff that way, legitimately, but when you're playing with VPN's it becomes a very different ballgame.
Paypal isn't born yesterday, many VPN's (even some level 1 VPN's) will result in a warm, hearty "hello, this is your friendly neighborhood BLACKLIST!!!" no matter how many bugs, worms, catterpillars or butterflies you throw at it.
Heck, even plenty of legit ip's will still result in Paypal giving you the old one-finger salute, but that's a different issue.

Ehhhh it might also get a bit shady legally if it involves sexting with two donkeys and a turnip, but I've never been able to get them to properly text.
Anyhoo.... looks like Facebook caved to the winky-winky-spanky stuff?
Last time I was on FB, even a picture of a fine lady with a bit too much boobcurvage showing would get shut down, no matter if she'd be propperly dressed or not... granted, it's been years since I've been on FB.
Bit more back on the topic at hand though... I don't care how much it pays, it's already cringeworthy when I touch my own junk, no way I'm going to "girl it up" and cyber some other guy on FB lol...

Hmmm.... $100 per day, for just a one-time fee of $20?

Hm... let me think about that...
Well, it didn't actually post the funny image I wanted to post as a reaction, but think of Mr. Burns going "100 dollars a day, for just 20 dollars? Eh, I'll be happier with the 20 dollars!"

Also, for anyone daft enough to sink even a single cent into this, don't do it.
Instead, each of you can send me just $10 so that I can share with you the secret of making $1,000 every hour and scoring with all the finest women...
Totally legit, honestly, I'm posting that here because I'm so tired of scoring with all these women and my giant mansion no longer has room for all the piles of money...
... yeah, I'll let myself out now, I suck at stand-up comedy  

1. If it walks like a duck, smells like a duck, and quacks like a duck, then that's no chicken you're eating.
A ponzi is a ponzi, regardless what name you try to slap on it.
For example, I'm typing this out with my left-baring evolutionary digit-equipped non-foot... anyone will know that's just a fancier (and yet more stupid) way of saying "my left hand".

2. Further using that logic of "if it walks like a duck", the timing and vocabulary from your quote can be easily linked to some other Ponzi-defenders.
One of which even shares a part of a name with yours.
Granted, it's the internet and coincidences do occur, so there's some room for "benefit of the doubt", but then again, if it walks like a duck, you know...

3. People get paid with coin from other investers, and apparently not all investers can get their "investment" refunded in time (but maybe in the next chain, hmhm) when there aren't enough "investers".
The only gamble here seems to be how long it takes before a tired horse collapses along the road to a bank, but beyond that, it sure smells like... P,O,N,Z,I, she ain't got no alibi it's ponzi....

There is one surefire way of getting rich from gambling:
- Step one, don't try to beat the house, the house always wins.
- Step two, now that you know that the house always wins, BE the house, and then others will bring their money to you.
(And not just their money; I've seen people gamble away their cars, their homes, one guy even tried to gamble away his mother-in-law... sure, when he actually won THAT one time, his wife didn't murder him but boy was he devestated when he actually won that gamble...)

This.
Look at this, folks, and you'll know why you shouldn't get into ponzi's/pyramids.
The ones running it win big (at least, if they're scammers, which tends to be the case with most of these schemes), maybe a few lucky early birds get paid once or twice, but everyone else below them in the scheme is just throwing coin into a bottomless wishing well while closing their eyes and wishing really hard that they won't get scammed out of their coin again... and again... and again...

Even with the best and most honest intentions when starting a scheme like this, the point is:
- A finite ammount of assets (money, bitcoins, sheep, whatever the currency of choice is) will get invested.
- Yet the promise is that everyone will be getting more out of it than gets put in.

If Suzy and Jimmy each have two apples, and Suzy wants to offer Billy and Katy two apples each, too, then Suzy will need to get her little butt to the apple orchard, instead of convincing Jimmy that if they pool their total of 4 apples they can magically offer the 4 of them (Suzy, Jimmy, Billy, Katy) a total of 8 apples.

Ah, the usual "We'll double your coin, honestly, we wouldn't lie to you" scheme.
Since this is the gambling section I'll say that I would bet their story was something along the line of "we know about this blockchain exploit, and because we want to make them aware we decided to run this site and give back to the poor" or something of that ilk.
Keywords being "I would bet" because I actually won't because they're long gone already, and "we decided to run this site" because, well, they have run, with other peoples' BTC.


opmac: 1; Cryptopot: 0.
God complex: disproven; merely thrown around while (poorly) attempting to deflect the issue that was pointed out... "oh you call me a scammer, you have a god complex you fascist, yaddayadda".... it's now July, about three months after the quoted posts, and a bunch of suckers are sad to see that Cryptopot... well... ran with their coins.
That's right, the mighty and brilliant and holiest of holy, Cryptopot, has surprisingly done the (not quite) unexpected and grabbed that prizepot when they ran for the hills.
For all you folks who came here through a google search like myself, I just saved you the time of looking for yourselves if the sites (cryptopot and BTDouble) are still up.
Them's gone, going going gone.
But hey, chances are you'll be able to find them somewhere else, under a new name, with a new and (really not quite) different set-up to lure in people.
--

As for the threadstarter:
Since this is in the gambling section, here's my two bitcents:
Your best bet at growing your BTC would be to set up your own honest gambling thingy, a raffle with real prizes, which takes payment in BTC.
Make the prizes something that you can get cheaper than what people pay to gamble on your site.
About half a year ago I got my hands on a bunch of USB sticks, 8GB each, at a price that was just brilliant (thanks to a friend who was going out of business and practically gave me some of his last inventory because I paid for lunch when I was helping him clean out his old shop), which I then put up as prizes in a one-off raffle on a site of my own.
Even with me paying for the postage, I still bagged a few hundred Euro's profit in BTC.
That I invested in another raffle, this time it was a raffle with one prize... people could enter for a chance to have a coder friend of mine build them a simple webgame, a service for which I'd pay.
Unfortunately that one was a mistake on my end; too niche and too poorly advertised, too few people entering, while the advertising that did get done came with a nasty surprise charge at the end which ate up the profits from the previous raffle.
Still, my advice stands as is; if you can get something for cheap enough that enough people might be interested in, set up a raffle which takes BTC as payment, and your BTC count will have a decent chance of growing quite a bit.
Or by extension, you have just a bit of bitcoin (pun intended, unless it fails in which case I will deny everything :p), a situation in which many more find themselves.
You could set up a small-fee raffle, against a very small fee in BTC.
One person stands a chance to win, for example, 0,001BTC.... make the entry fee a fraction of that...
For example, if the "pot" is 0,001BTC for -one- lucky winner, and you get 20 people signing up with a fee of 0,0005BTC, you'll have 0,01BTC coming in against 0,001BTC going to the winner.
I'm just pulling hypothetical numbers out of my hypothetical rear end here to present an example, but the logic behind it stands.
Just be sure that you'd be honest and transparent in doing this, so you don't end up on the same lists as all those scammy scumbags.
Maybe find someone who could work as a reliable and trusted middleman/escrow person, so people would feel even more confident about it not being a scam...
You could even set it up on a forum...