The skyrocketing price of bitcoin gave rise to ethereum, ripple and other altcoins. However, the bullish market, which has spawned over 1,500 cryptocurrencies, has turned bearish, and some cryptos are imploding. Bittrex, a major US-based cryptocurrency exchange, said it would remove a total of 82 altcoins from ‎its listings by March 30. The majority of the delisted alternative cryptocurrencies have...