BITCOIN 'whales' who hold staggering sums of the cryptocurrency could crash the market, experts have warned. In December 2018, a single coin was worth $3,300, and in November 2013, one coin was worth as little as $350. Now experts have told The Telegraph how there are fears that Bitcoin "whales" hold too much sway over the market. It's believed that around 2,500 "whales" control roughly 40% of the Bitcoin market. Experts worry that single trades can make huge changes to the price of Bitcoin – swamping any movements by smaller investors.