Bitcoin is a good investment now because the future of buticoin is expected and predicted very big. As what you mentioned is acceptable, any thing can happen any time same like 2008 this 2018 also another recession can hit the world economy. So we should prepare for everything. My opinion is 2018 bitcoin will achieve all time high rate which the world will see.
yes you are right hopefully in 2018 bitcoin the higher the price. Many people are not guessing why the price of bitcoin in 2017 has increased the price. Maybe you are one of those people who are surprised and disappointed not to invest in bitcoin market. One reason is that there are many people who are interested to use bitcoin as an investment tool thanks to the price that tends to increase until now.