Bitcoin Forum

I wanna use these datas for my final research and need to be valid. These datas are everyday close and open BTC price from 2017/12/10.

None of the sites or any other sites can show you the future price of Bitcoin so I am not sure what you mean with that.
If you go to CMC and click on Bitcoin you can see every exchange it is traded on including current and historical prices. CMC is probably one of the mostly used reference points when it comes to crypto currencies and their valuations. 

I mean the Future contracts of BTC. Its an option to buy or sell in future with a price.

I think that all the sites you posted show some average/aggregated prices.
If you want proper market prices you have to use proper data from proper exchange. Of course, the prices are not the same on each and every exchange (and beware, some exchanges work with USDT which is not 1 USD all the time), but that's the best you can get imho.
So just go to cryptowat.ch or bitcoinwisdom.io or other chart, pick BTC-USD chart with one week lines and if needed scroll left. I don't know if you can get access to the underlying data, but it should be okay.

Bitcoin futures are something else, you should check the sites that offer such products. Most of us here work with the real Bitcoin.

Thanks for replying. But these exchanges just show charts and you can use andicators and technical skills. If you wanna historical datas, like 2 years past, there is no downloading stuff like Excell files. I need everyday open and close price from 2017/12/10 (december) to now.

https://99bitcoins.com/bitcoin/historical-price/   are way best. They have datas from way further back then any other source. Bitstamp used to have quite old but they refreshed their site last year when changed owner.

You can check the chart at Coinmarketcap. there it will provide enough information for you or you can look at 99bitcoins.com
They provide quite enough information about prices, psychological charts and related events.

I think the choices you made to vote are the options that appear first when you do a Google search for "Bitcoin price historical data."
Many of the platforms did not exist five years ago, the last two years and the last year so you will not get accurate information about the real value of Bitcoin price but about the average prices.
So either to search for all the platforms that work during that period and then get historical data for all platforms or rely on the averages provided by sites such as CMC.
try

 - https://www.coingecko.com
 - https://coinmarketcap.com

And DON’T PAY FOR THAT INFO

As far as historical data then there is cmc: https://coinmarketcap.com/historical/

In which data can be traced as far as five years ago, so that is a pretty decent gauge if you wanted to see the historical price.

I'm still surprised to see people keep mentioning CMC when it's already listed on the poll by the OP. And it's the FIRST option on the poll.

He probably needs your vote, not your post.

You probably should have included in the OP that you meant futures contracts.

CME is currently the largest and most dominant player in the cash settled futures contracts. CBOE has stopped offering Bitcoin futures very likely due to the low volumes they were generating.

Historical CME futures contracts price and volume data is downloadable here: https://www.investing.com/crypto/bitcoin/bitcoin-futures-historical-data

Another useful link: https://www.cmegroup.com/trading/equity-index/us-index/bitcoin.html

Prices open and close every day? is it like an accounting report? on information sites like CMC, CoinDesk average is only a monitor. if you need data for reports, maybe you can Screenshot data from the website.

Coinmarketcap actually does show the opening and closing price of the day. I have no idea what timezone they're using though. Lots of these sites treat Bitcoin like stocks for fluff.

Thanks. It was very useful.

Easily hands down coinmarketcap. You should see how strict they are when it comes to smaller coins as well, they are not inclusive and when they see a coin look like it doesn't have decent volume they do not add a coin to their list plus even if there is enough volume they check how that coin made that volume and if it is like same volume over and over every day that looks like one person trades everyday to make it alive then they don't include it neither, they want it to be organic volume and not a fake one.

Hence, coinmarketcap seems to be the best data provider of crypto currency at this moment. There is none that is as legit as coinmarketcap and also does their job at an elite level that coinmarketcap does neither. All others are just far inferior to it.

Coinmarketcap would have been the best answer for me, but when you talk about historical data, it is far more than just ordinary values, with coinmarketcap, you can always rely of them to get the history value of cryptocurrency from the point they were established, but when it comes to other related areas like the histories of so many cryptocurrencies itself and many more, I think yahoo and Google will absolutely be the best in this regard.

So, it depends on the type of history that you want that is what will really determine which one is the most effective to you, but for me, I strictly would stick with coinmarketcap and yahoo for historical data on any coin of my choice and they have certainly been too effective in this regards.