Opinions, yes. But before we get to that, could you expand on why you see each of these as promising? Anyone can come up with a list, but what is the thinking and logic behind the list?
[I ask the same questions anytime I get "stock" recommendations]
I have my own opinions on these coins but many of others might have different but for example, let's talk about ethereum
1: Ethereum mines, company like intel, jp morgan,etc partnership
2: ICO AND contracts using ethereum gas, Supply and demand eco-system
3: Big Community
4: Recent sky-rocketing of price and new interested companies on way.