There are few cryptocurrencies other than bitcoin that will be Monero, Ethereum, Litecoin and so is preferable for me.
It's simple for me to think, a good foundation that brings good utility and fairness to the need to open free in the world. It would be legitimate and nice to contain. ETH will be crucial, in addition to its technical character built for the majority of altcoin projects today. TRX, EOS is also great. Or the latest is defi with DOT.