They aren't exactly "clones" of bitcoin but they have the same nature of existence, which is being a cryptocurrency and exist within the internet. Like bank investments, every bank have their own rates but there is always this bank that will have the highest rate among the others. Some cryptocurrencies like ethereum and e-toro are showing potential in terms of price growth, but a lot of them are falling short in the long-run. Bitcoin will always remain the number one cryptocurrency in the market due to its reputation and volatility compared to others.