I think bitcoin is an investment that may be very profitable, some of the problems that exist only the value of how much effort we do.
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 2M 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. If btc does not become a long term trusted store of value, its likely price will be close to zero unless it become a cool collectible which is a possibility.