There are few cryptocurrencies other than bitcoin that will be Monero, Ethereum, Litecoin and so is preferable for me.
I wonder if there are the most important cryptocurrencies, why are there so many of them? Then people would only invest their money in important coins. It seems to me that there is no such thing as important cryptocurrencies, there are promising and stable ones. For me, these are a few of the top 5 coins, after Bitcoin and Ethereum.