Upvote + Following :)
Congratulations on organizing this debate and thank you for the chance to receive the NXT even if I don't receive it!

1 - Bitcoin: The obvious, the future true Gold! There is no doubt of your ability, there are problems of course, but it is sovereign!

2 - Steem: You just said that there's a bubble and that it can burst! Steem already experienced this, went through turbulence, just like Bitcoin, is sovereign in his area! The future social media is here!

3 - Ethereum / Ethereum Classic: I'm looking forward to what will happen with Ethereum, because whatever happens to it, Ethereum Classic will benefit or not! The PoS will determine the course of things, can we say that Ethereum has become a huge bubble or is it a decent price? Owning a large community is one of the pillars to survive any bubble burst and for sure ETH and ETC are ready.

4 - Waves / Lisk: What do they have in common? The revolution of ICOs project, raised millions of dollars! Both have now started to deliver some result, Waves is ahead at momment, Lisk has been preparing great news! For the investments they have received and trust, they need to deliver results and if we notice they are not being affected by the bubble, because already there are millions and millions invested in both projects, the expectation and space for growth in the two are good and great.

5 - Monero: Cryptonote presented problems a while ago and this affected a bit, but was overcome and is certainly a worthy rival for ZCash, Monero currently the preferred for anonymous and secure transactions! There's a lot of room for growth and it's not part of that bubble mentioned.

6 - ZCash / ZenCash: Monero's rival in the sense of anonymity! At the end of the year the reward investor will end and gradually these rewards will come back to the miners! Bitcoin is the Gold, ZCash would be the currency? Let's wait. Zen is a ZClassic fork, ZClassic is no reward investors, Zen is an enhancement of ZClassic with more features, perhaps escape the ZCash lineage, becoming another option of anonymity.

7 - Decred: Is it necessary to speak of this great coin, project, community? Recently one of the coins supported by Charlie Lee has been added to Coinbase, PoW/PoS is a total success!

8 - Factom: Ensuring millions of real-time records in the block chain with a single hash, only Factom is capable of this today! Can you imagine the utility of all this? Plus it's not being part of that bubble, showing solidity and consistency, a great community!

9 - Augur: A market of prediction... All people love this sort of thing, all the time banking professions and speculations! Augur with technical information will provide you with everything compiled and ready for use, it's a project that is not in the bubble, which is funny, it should be! Great community!

10 - SONM: It will still be released, promises to revolutionize the cloud computing market, relying on fog computing to lower the cost of mining for those who buy computing power in the cloud and who delivers those energies among other utilities in real life, is the big project of the year , with or without ICO!

There are more projects, but you asked from 3 to 10, here are the ones I most interesting in various points of view in my opinion!
my NXT address is: NXT-97H4-KRWL-A53G-7GVRG
my NXT message: 8e8b4203569e416b982de2f83c7930be413becb1c0244194802083c0c9ade767

I'm using a Trex address, thanks for the opportunity to write and keep writing and spreading the word Steem, Steemit!

Thanks a lot, man!