I rather preferred Ethereum rather than Bitcoin. That eventhough to consider that bitcoin is the first cryptocurrency, and the most highly valued coin, what I will tell is its advantages over bitcoin. That is first, Ethereum is currently been used in the crypto currency market and have been producing many many ICOs and tokens for people to invest with together with some shit and some potential projects. Ethereum also has a unique feature when transfering funds because of the use of ethgasstation, to know how gwei will be used against a transfer. Ethereum is the not only one altcoin, but there are a lot of them, especially more potential.