Litecoin creator issues stern warning after the cryptocurrency doubles in a single day

Litecoin, a smaller cousin of bitcoin, has seen its value more than double in just one day. 
Litecoin creator Charlie Lee tweeted a sobering warning to those not prepared to lose their entire investment.
Still, Litecoin fans on Reddit were preparing celebrations, some of which seem fairly risky. Cryptocurrencies have exploded since bitcoin futures began trading in Chicago over the weekend.
Litecoin, the fifth-largest coin by market-cap, has seen its value more than double since Sunday