Bitcoin climbs to $12,000 even as RBI warns against cryptocurrencies

Bitcoin surpassed $12,000 for the first time amid speculation that the widespread use of futures will help lead to digital currencies being viewed as a legitimate asset class for mainstream investors. The largest cryptocurrency by market value has soared from less than $1,000 at the start of the year as optimism climbs for the distributed ledger technology known as blockchain that is at the heart of bitcoin.