BTC is back ? is that good time to invest ? or still wait for few days ?
At present, when the exchange rate of BTC and altcoin are tending to decrease after a series of exchange rate increases, investment in BTC at the time of the exchange rate decline is correct, because indeed, the exchange rate of BTC will increase in Q3 and Q4 in 2018. You should wait until the exchange rate of BTC drops to the bottom then invest in.