I tried to add those to the payload, but it even cannot run. Can you help me to get this run? I will be very happy to send you money just to say thank. (If you offer a service to do that, pls give me the price ).

// work in progress

// you need a poloniex API key and secret with trading option enabled
// you can test it with:
// = poloniex ("returnBalances","BTC")
// or
// = poloniex ("returnBalances")


function poloniex(command,options) {
     
  // I assume that all the keys are in the "keys" spreadsheet. The key is in cell A1 and the secret in cell A2
     
  var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("keys");
 
  var key = sheet.getRange("A1").getValue();
   
  var secret = sheet.getRange("A2").getValue();

  var nonce = 1495932972127042 + new Date().getTime();
     
  var payload = options || {};
  payload.nonce = nonce;
  payload.command = command;
 
 
  var payloadEncoded = Object.keys(payload).map(function(param) {
    return encodeURIComponent(param) + '=' + encodeURIComponent(payload[param]);
  }).join('&');
   
  var uri = "https://poloniex.com/tradingApi";

  var signature = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_512, payloadEncoded, secret);
   
  var stringSignature = "";
 
  for (i = 0; i < signature.length; i++) {
    var byte = signature;
    if (byte < 0)
      byte += 256;
    var byteStr = byte.toString(16);
    if (byteStr.length == 1) byteStr = '0'+byteStr;
    stringSignature += byteStr;
   }
   
  var headers = {
    "key": key,
    "sign": stringSignature
  }
 
  var params = {
    "method": "post",
    "headers": headers,
    "payload": payloadEncoded
  }
 
  var response = UrlFetchApp.fetch(uri, params);
 
  var dataAll = JSON.parse(response.getContentText());
 
  //Edited
  return JSON.stringify(dataAll) }
  //end edited
}

poloniex("buy", {
  currencyPair: "USDT_ZEC",
  amount: 100,
  rate: 0.01
});

Exactly, Bitcoin need fix issue in Blockchain about time confirm transaction if want become to digital cash for purcharse everywhere. Not only still confirm slow, use Bitcoin for purcharse at now with small amount very difficult, sometime the fees can high than the price to buy one thing.

Ist dann beim Mining bereits der Gegenwert vom Bitcoin steuerpflichtig oder erst, wenn man ihn verkauft? Gleiche Frage auch für Signaturkampagnen.

I've heared that in some countries people have to pay the income tax after buying fiat for their bitcoins. Anyone faced such problem? If yes then how you deal with it in your country?
At one point of view  bitcoin is an instrument for investment so ppl buy it willing to get income in their currency.
At the other point it is a currency and it might be used with a purpose of saving. In this case the tax would be stupid.

It might be a good sign because they tried to accumulate more bitcoin for 1 august,you can see it in every altcoin exchanger every altcoin goes down while bitcoin goes down too.doesnt that mean they're trying to accumulate more coin ?

Haha, über den Satz bin ich auch gestolpert. Echt mega.
Was ich auch bemerkenswert finde ist, dass Goldman Sachs so exakte Prognosen machen kann 

Yes, and it is a growing shadow. If more ICOs are scams etc. there more this industry will be banned or centralized.
That is why I proposed "light" regulations and partial centralization which would be something like a bridge between the two worlds.

What do you think an adult ICO would be about?

I believe that they're popular mainly because well it was the first of all cryptocurrencies to be made. Honestly most of the other coins are scams and greedy ways that the developers make money. The only other coin I can think of that isn't a scam are dogecoins! What do you think?

Warum Bitcoin-Anleger die Flucht ergreifen

http://www.n-tv.de/19932958

negative Schlagzeile mit informativem Artikel, der unter anderem Segwit, Bitcoin Unlimited und Segwit2x anreißt. Anders als der Titel vermutet geht es nicht nur um Negativschlagzeilen, ein Absatz ist z. B. mit "Eine Krypto-Blase? Mitnichten." betitelt.

Bitcoin was not made to scale as easy as newer blockchains are, mainly because newer applications knew the problems they had to overcome by looking at Bitcoins mistakes.

I agree with a few other members here. We are past the "let's fight it" era and have entered the "we must create our own to compete" era.

In my eyes, the tech behind Bitcoin is not great compared to other newer currencies, but it has the reputation and dominance. And to me, that's enough to keep Bitcoin at the top of the crypto game for years (or decades) to come.

Actually few days ago it was published that a big post office chain in Austria is going to sell Bitcoins. So there was bit more then just this

Can anyone give  a short answer about what the chain split is I have had a read around but still learning what everything means

I also have over £2,000 in bitcoin would like to know.

Thanks

Since all fiat is a claim on something that doesn't exist, it is credit.

for that i always suggest everyone to buy in steps. you first come up with a price range that you speculate is the bottom or won't go lower than that. for example $1900 to $2100. then you start placing all your orders.
majority of them in this range. then you place some lower orders but smaller for example you place $8000 in total of 10 orders in that range then place 2-5 orders of total size $1000 in $1800 to $1900.
also you place some orders above the highest price for example at $2200 you place 2-5 orders of total size $1000.

Every problem we discuss revolves around bitcoin and its potential. All the fluctuations and adjustments, they are causing losses to a lot of people, but conversely, many say it is good for the market.