To me I think that bitcoin have a realy promising future because as we all notice bitcoins going higher by the time and a lot of people showing a big interrest with investing in bitcoi. also bitcoin is the core of all digital currenceys so i think that bitcoins will stay on top.
I think
you misunderstand and have not answered the OP question. I think there are different cryptocurrencies that will follow in the footsteps of Bitcoin. But I'll mention just a few. First, Ethereum will be the most important among all Altcoin, it's because Ethereum has
the highest price among Altcoin. Second is Litecoin, although the price is currently difficult to move, but lately I hear Litecoin shows a pretty good change. Although I'm not really sure about Litecoin. Waves is a good investment choice Altcoin if I think you can see from the development of significant price,
even though the price is still low.