Yeah it is good to buy and hold bitcoin because till end of 2018 bitcoin will be out of reach and then it will be tough to have bitcoin at that much low price as it is available right now. I know bitcoin is high in price even now because price changed very highly from the start of 2017 till end of 2017 and now we will see bitcoin growing more for more till end of 2018, 19 so for me coming every year will be year for bitcoin.