The way Bitcoin is going, $1000 to $20,000 and then to $6,500 and all the bans worldwide and Bitcoin used in many kinds of criminal activities.
I will come back to Bitcoin after 5 years. If Bitcoin is there, it will go the silver way. Just as Silver was $80/ounce in 1980, Bitcoin can go back to $400.
Bitcoin investment needs much patient. If you will compared this to silver then you can't get your best answer as bitcoin can double your money in a long term investment.