Ethereum is a threat to bitcoin? Yes it is. We all know that ethereum was created by a russian programmer on 2013, and it was launched on 2015. After 3 years it is next to bitcoin in terms of popularity and value.
Let me show you some NBA perspective on this, bitcoin is the king of cryptocurrency right? same as LeBron as the king of NBA. But here comes ethereum the prince of cryptocurrency just like Ben Simmons as the prince of the NBA. The prince will dethrone the king on the eastern conference finals same as ethereum that will dethrone bitcoin in the next couple of years. Wether we like it or not the king will reach its limit. Mark my word. Trust the ethereum process!
Bitcoin is the personification of the strength of the crypto-currency market, he is like the father of the family. But I hope that in the near future it will be replaced by a new crypto currency, the Etherium, since it has better potential than the father.