Deribit Avis 

Really bad in general. When you have position a trade open is impossible to see a basic profit/loss or balance. Too many data worthless.
The platform is very unfriendly.
Now, I have an Option BTC JAN15 in the money and the price is BID 4,000 ASK 5,458 so look the spread!. I am not happy with this. They normally have bad spreads, like 300$ but this is like robbing me.
Really disappointed. Waiting to close this trade and get out of this bucket shop.

ik doe nu al 2 jaar trades op deribit tot volle tevredenheid.
uitstekende snelle backoffice.
hele snelle uitbetalingsafhandeling.
prima liquiditeit. zij hebben niet voor niets 87% marktaandeel.
goede klantbescherming.
ik heb een paar negatieve reviews gelezen die grove onjuistheden bevatten.
voorbeeld: de klantbeschermende 3 dagen wachttijd voor een nieuw adres. dat kan in tegenstelling tot het beweerde WEL worden veranderd.
de negatieve toon van genoemde reviews vind ik beschamend voor de reviewers

Clearly a lot of bots, though can't say if any are their own or if it's just a lot of client bots. My gripes are that you can only use prices in multiples of $10 while most sites allow 1$. Couple that with no USD based balance being shown anywhere on the site and you have problems trying to hedge your balance, you can only get something close to an accurate hedge but never an exact one like you can on sites that actually care about customer convenience. Another thing that will tick you off is the fact that there's a 3 day delay on withdrawal addresses after you enter them in the address list, no matter what you do. The thing that is supposed to let you change the delay to 0 days just doesn't work, and I don't believe there's any way to make it work. I seriously think they purposely lock your funds up in there for 3 days just so you can't remove them and are therefore more likely to lose them before being able to withdraw them.

The fact that they don't reply to complaints right here on TrustPilot, which I'm sure most exchanges are aware of existing, tells me that they really don't care at all about their customers or potential customers. Maybe since they moved operations to Panama they're not even trying anymore. Actually the only good things about Deribit are that aside from having your funds locked up for 3 days you can withdraw at any time of the day, which is a big improvement over the sites that only do withdrawals once a day or at 3 certain times a day, and the fact that funding is constant instead of at 3 certain times a day like the others, so prices do stay closer to index than the other sites which pretty much ignore the index until the funding times get close, making the index pretty pointless to even have. So really if they just made the minimum position amount $1 and got rid of the withdrawal waiting function completely, unless it actually worked, right away, the first time you tried to make it 0 days, which it DOES NOT, it would probably be as good an exchange as their competitors, which they currently are clearly not. Right now it's basically a site designed to tick users off, as far as I can see, and they do a good job of it.

One last gripe, the way the "transaction log" is set up you never know what your balance really is. It's definitely not what it says in the "balance" column. You don't know what the balance really is until settlement time, once a day, unless you calculate it yourself by doing math on the "cash flow" column and the "balances" column. I guess the wallet balance on the main page is close to what it actually is but that's not as accurate a figure as the one in the transaction log balance column because it's only 4 decimal places instead of 8. All they had to do was put the actual balance on that transaction log page and people would have been 99% less ticked off. See this is another example of them just not caring about their customers at all, apparently. I mean why even put something labeled balance if it's not the real balance at the time other than to tick people off? There's literally no other possible outcome from that, same as with locking your funds in there for 3 days. That was not on the site before recently. Apparently they figured things weren't annoying enough for their customers so they had to up the ante of annoyingness by tossing that grenade in there.

Deribit scammed me of my money. This occurred with their BTC options. I have seen time and time again that their predatory market makers have continuously manipulated options prices to liquidate retail traders' accounts. There is a high probability that Deribit has an agreement with its market makers to take a cut of the ill-gotten profits. The option prices can all of a sudden have spread widen so much that it is impossible to buy nor sell nor exit a position unless you want significantly reduced profit or a larger than expected loss. Profit and loss is determined by the mid price, which Deribit claims is to deter price manipulation. But THEY are the ones doing the manipulating! I have seen options prices swing drastically despite the underlying BTC price not moving. I suspect this is to wipe out retail traders and pocket the huge profits for themselves by margin and liquidating unsuspecting accounts. YOU HAVE BEEN WARNED. Never dare using Deribit again. A FRAUD excuse of an exchange.