I think decentralized coins will be invaluable in 2018. Decentralized projects attract attention.
I have shaped my investments according to this reason.

For me Ethereum/Siacoin and then tokens - first token for me is NVT - https://novablitz.com , https://t.me/novablitz

Good tokens and coins with sound companies behind them.

I think that people should invest in ETH or NEO, because this is really a high cost altcoin, and it has been applied a lot in the world. In 2018, the prices for these two altcoyins are likely to compete directly with the BTC

My favorite project for 2018-2019 and many more years is Bitcoin. Because it is the brand face of this market. And it looks like it will be like that for many years. It can be included as a crypto and digital gold.

As for the Altcoins, Ethereum and Zec are the ones who will first get independence from Bitcoin's kingdom.

My experience 2017 and what I think about 2018.

I do not invest in ICO's again. I only made losses at the ICO's this year. (example Polybius (10$ each Coin on ICO), ARTE ) . I'll wait until I see the coins on the market and observe first.

My best experience 2017 is with existing coins that are already listed somewhere and have a very active community and DEV's. ( PIVX, STRAT, WAVE, ARK)

In 2018 I see this potential at POSW and UNIFY. I have been observing them for some time and they are currently growing strongly in the areas of community, the teams behind them and what's behind the coins.

I think in 2018 I will pursue the strategy: Never ICOs, first observe how the coins develop then compare and then invest.  

And there will certainly be more coins that are worth it! POSW and UNIFY are only the start of 2018

It's depends on your knowledge to investment in ICO, I see some of ICO is success after launch in the market
like CINDICATOR the price of ICO is $0.01 and after launch at exchanges the price is increase to $0.02 and now, the price of CND is $0.05

I think that the best investment coin in 2018 will be bitcoin, and I will advise you to invest, if you want a big investment, then you have to go to bitcoin, because bitcoin will go $ 10,000 in 2018, you will earn more money in bitcoane . and if you have a small amount of investment in spruce, you can go on the airwaves. ETH is also the best coin for investment, but for long-term investments you can wait for your profit.

Ethereum is a true outlier and it is the only crypto-currency believed by experts to be able to overtake Bitcoin Market cap in the near future. Ethereum started in 2013 and had 40x growth rate over the last two years.

I WILL RECOMMEND ONLY ONE AND TOP PERFORMER OF 2018. PAYPEX (PAYX). KEEP ON TRACKING

I like your top 5, especially Stratis