Whether one should invest in bitcoin or not depends on whether you think Bitcoin will become a long-term trusted store of value.If it does become a long-term trusted store of value, BTC should trade around $2,000,000 a coin (depending on how many coins are lost and are actually in circulation). That is over 100x the price of where BTC is today.
From Should I Invest in Bitcoin in 2018? Here are 4 Things You Have to Know
https://99bitcoins.com/should-i-invest-in-bitcoin-heres-what-you-need-to-know/