There are few cryptocurrencies other than bitcoin that will be Monero, Ethereum, Litecoin and so is preferable for me.
I consider top coins as valuable coins because they have established a good foundation already that's why most investors trust them. One of those coins is Ethereum which has been showing good potential for years. I'm sure that more coins would show good potential in the coming years. I would always prefer coins with a good reputation.
I also prefer ethereum, litecoin, cardano and monero as the most important cryptos aside from bitcoin. These coins have the potentials to succeed and grow their value more in the future. Litecoin which follow the footsteps of bitcoin, cardano that has also been dubbed as ethereum killer and monero which is a secure, private and untraceable currency that has a strong focus on decentralization and scalability.