It is not very simple to answer to the question above mainly because there are more the 700 alternative cryptocurrencies. Of course many of them can\'t be perceived as a good profitable investment and only few of them are worthy of considering. How can we know if some of the alternative cryptocurrencies is a good investment? There are many factor that need to be included. First, we need to observe all kind of services that some platform are providing to its users, and we can mark this as a number one factor. Developers of the platform and project could also be key element, but the very first characteristic of good cryptocurrency is adoption rate. Anonymity and security are also becoming the most seeking factors, and we all know that security of coins is the main reason if some cryptocurrency is good or bad. Besides all this factors, transaction time can also be a characteristic, lower transaction time higher adoption of digital currency.
Transaction time is one of the biggest issue when we are talking about Bitcoin. The advantage, in comparison Bitcoin to all others cryptocurrencies is getting Ethereum. Some people are calling Bitcoin crypto version of gold. If Bitcoin is gold than Ethereum is silver. The reason why Ethereum is second place comes to the fact that Bitcoin was first cryptocurrency ever. For that reason it is more globally adopted, even Ethereum has lower transaction time and block time is better and it has more advanced algorithm.
Traditional mining of Bitcoin is overcome, you need big investment in hardware if you want to mine Bitcoin. With Ethereum, thing are opposite. Ethereum is still mineable through the standard mining rig, GPUs. Another great characteristic of Ethereum are smart contract and the fact that on platform you can develop your software and get funded through network. Another great cryptocurrencies are Litecoin, Zcash and Monero, with the great future ahead of them.