even being the #1 can mean only like 50% profit in 2018, or even more decline as in eth right now.so thats kinda the wrong question. see ripple made x1000 or even more depending on when you bought/sold, in 2017. bitcoin only made x10, eth only made x100. now all of these are very high with a too big marketcap and can only lose.

ETH is the dumbest choice you can put your money in, i am pretty sure all the others you mention will give you a better return. also how much can it cost to invest in great blockchain devs to bring same technology as eth? maybe $5 million? $20 million? how is that worth $100 billion? its ridiculous.

but for really skyrocketting returns you need much smaller ones like spacechain which also supports a ton of languages. nobody can know yet how big of a success spacechain is going to be, but if you split your money over a couple of similiar or even cheaper projects, just one will make you more profit than keeping most in eth.

i would be very interested to hear more about very low market cap projects similiar to eth, neo...