Bitoin crosses $43,000 on Monday after electric carmaker Tesla invested $1.5 billion in the digital currency. Bitcoin hit $43,725.51 around 1300 GMT, before cooling slightly to $42,352.
The cryptocurrency is up around 50 percent since the start of the year.
Tesla Inc said on Monday it had invested around $1.5 billion in bitcoin and expected to begin accepting payment for its cars and other products with it in the near future, prompting a 7% jump in the electronic currency.
Tesla said in a filing the decision was part of its broad investment policy as a company and was aimed at diversifying and maximizing its returns on cash.
It said it had invested an aggregate $1.5 billion in bitcoin under the changed policy and could “acquire and hold digital assets from time to time or long-term”.