which happens to cryptocurrency without bitcoin, I think there will be fewer investors, and will probably have a bad impact on altcoin prices. bitcoin is like a mother, which is the inspiration for other altcoin.
and I think it's possible that another altcoin will replace bitcoin, because altcoin like ethereum keeps rising. but do not know if bitcoin is lost, cryptocurrency will be more interesting or not.
Absolutely No, because of bitcoin crypto world became famous around the world and if bitcoin is gone, crypto will end up badly, maybe it can stay around 1 to 2 years but it will go down. Because no one will invest on it, most of the investors in crypto invest in bitcoin and if bitcoin is gone also the investors will gone.