I think this will never happen. Bitcoin is the king of all the coins. It has great value. Bitcoin has gone through many challenges, to survive to the present. Bitcoin is trusted by many investors. It is very difficult for the altcoin to turn a bitcoin.
in my opinion that won't happen. Bitcoin prices dropped all coin prices also fell. because of bitcoi. is the king of coins. and bitcoin has been a lot against obstacles to survive until now. it's very difficult to replace bitcoin from all coin coins.