An important aspect for a cryptocurrency to be become big is scalability.
Ethereum recently pumped due to Bitcoins lack of scalability, but the bancor ICO showed that Ethereum also scales poorly.
So the next big thing will probably be a currency that scales well. But which one will be the leading one?
NEM (with catapult), IOTA, Radix and EOS probably will be able to handle thousands of transactions per second.
In my opinion this is worth nothing if there is no pruning to remove old data. However, it is difficult to find information about which of these coins are able to efficiently prune old data.
So an important question this thread could answer is which of them actually scale well enough for mass adoption (by for instance having efficient pruning).
Furthermore, all these coins have different capabilities. EOS is a full Ethereum competitor, NEM can run simple smart contracts and Radix has several applications running on top of it (I did not get into it). Not sure about IOTA. Which of them has in your opinion the best capabilities and how important will this be to become the dominating currency (in market cap)?
... and of course there is still bitcoin. Do you think the lightning network will solve bitcoins scalability problem?
I see the problem that the technology is complicated (you need to keep a payment channel open all the time) might be too late (we need a solution now and not in a year) and in the end all lightning transactions must still be settled on the blockchain which still requires huge blocks for mass adoption.
I like NEM, especially their philosophy and the consensus type they use. But I'm afraid they will not release catapult on time and EOS will take the leadership...
