Investing.com – Bitcoin rebounded to record fresh all-time highs on Tuesday, shrugging off security concerns in the cryptocurrency space after cryptocurrency Tether suffered a multimillion-dollar hack.

On the U.S.-based Bitfinex exchange, bitcoin rose to $8268.2, up $41, or 0.50% after rising to an all-time high of $8380. Bitcoin’s market cap surged to $137 billion.

The record high in Bitcoin comes after it rebounded from a sharp fall overnight to $7,755.60 on the back of security concerns as tether, a start-up that offers dollar-backed digital tokens, said hackers stole more than $30 million from its investors.

Sentiment on bitcoin remains positive amid expectations that institutional investors are set to the cryptocurrency space after derivatives marketplace CME Group on Sunday provided an update on its plan to introduce bitcoin futures before the end of the year.

"Effective Sunday[,] 10 December 2017 for trade date Monday[,] 11 December 2017, and pending all relevant regulatory review periods, please be advised that CME will launch Bitcoin Futures." The CME Group (NASDAQ:CME) noted on its website.

Other cryptocurrencies struggled to match bitcoin’s momentum as Bitcoin cash fell 3.70% to $1,200.70, while bitcoin gold rose 9.29% to $234.97.

Ethereum, the second largest cryptocurrency by market cap, rose 0.09% to $368.03.

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