Quote from: becoin on December 08, 2018, 12:38:42 PM

Quote from: pönde on December 08, 2018, 12:30:05 PM

Quote from: becoin on December 08, 2018, 12:18:48 PM

Quote from: pönde on December 08, 2018, 12:13:51 PM

Quote from: becoin on December 08, 2018, 12:10:04 PM

Quote from: pönde on December 08, 2018, 11:49:20 AM

Does the seller side has to have the bitcoins when the contract is made?

No. That's the whole idea behind "regulated" bitcoin markets. You don't need to have a single satoshi to sell thousands of bitcoins and suppress price.

Bankers think that bitcoin ETFs will solve bitcoin supply "problem".

When the contract expires seller has to anyway have to get the coins from somewhere to be able to sell them to the buyer?

Nope. Actual delivery of bitcoins is forbidden. Just like in gold futures and ETFs. At the expiry date profit/loss is cleared through the seller's margin deposit which is in dollars. If the seller is systemically important bank and they did the wrong bet Fed will print new dollars and will give them to pay for their loss.

The buyer side was there to buy some bitcoins. If he will not have them, what will he have? The dollars?

The contract said for example buyer will buy three bitcoins for price 3500$ per one coin which is total 10500$. But the day price is 4500$ per bitcoin which is total 13500$. So the buyer will have 3000$ for bank account?

Yes, buyer will have $3000 credited to their margin deposit/bank account.

Regulated bitcoin markets are not for trading bitcoins but for bets on the future bitcoin price. Profit/loss resulting from those bets is paid in dollars. So, if you have unlimited access to the dollar printing press you can sell 21 million bitcoins without having a single satoshi.

Futures markets were originally designed for "hedging" commodity prices, so that producers could plan and lock in a profit and buyers budget for their material costs while the actual "real" goods were on a boat somewhere.
I wouldn't be surprised if Bitcoin miners have been hedging their production by shorting futures since the bear market started (and derivative crypto trading became easier) and then simultaneously closing the shorts and selling the "physical" bitcoins as they mine them.
As Bitcoin isn't a consumable commodity in that original sense, there aren't the counterparty hedge purchases being done, only speculative buying (or not).