The future of bitcoin will be as bright as ever. The development undergoing with bitcoin will contribute to its markup in value within the next 5 years. Lightning Network implementation is nearing to its completion, The whales on accumulation stage currently, mainstream media covering bitcoin resulting to another public panic buying to cause an uptrend, and BTC mining reward halving by 2020 could possibly make bitcoin price rise to the moon.
Last year bitcoin price so high that were not expecting price could reach that amount. So in this year, I think it will reach more than the price by most speculating it. It can achieve last year so I think it will this year.