Bitcoin’s trademark volatility is again rearing its head, showing investors the risk they’re signing up for when they put money into the cryptocurrency. The digital coin cratered as much as 10% on Monday, amid a global market decline. Bitcoin was last down nearly 8%, hovering around a price of $43,800 per coin, according to data from Coin Metrics. The rest of the cryptocurrency market was also in a slump, with ether down more than 9% to about $3,046 per coin. The extreme swings up and down are relatively common for cryptocurrencies, and investors can expect them to continue in the future. “The only thing I can expect ... (full story)