To profit from the bull run expectations, buy OTM call options at a low price and profit when the options move towards ITM
ETH Sep 2019 are costing 0.45 USD at 640-760 strike levels
You will be loosing money on theta (Decay of Time) and vega (Possible decline in volatility) but gaining more on Delta and Gamma (as the underlying moves towards the ATM & ITM)