I think Bitcoin's price will fall sharply one day, but that doesn't mean the cryptocurrency is doomed to But it has a big effect in crpto currencies if bitcoin crashes .. It only have 21 millionth bitcoin that are circulate in the world and currently 12 million are already used ..if they reach the max circulation it also affect the crypto world and the worst btc will destroy it also affects altcoins because btc is the main reason why crypto are popular.