Yeah, I think it will be hit 500$-600$ soon.

Hold your bitcoin 

Poloniex, Bittrex and Etherdelta are best 

It depends with what do you want trade. Because bittrex is centralized etherdelta is decentralized and you and trade ERC20 tokens with etherdelta.

Please hold Stratis and Siacoins but I don't have any good idea with Digibyte.

INS ecosystem is pretty good project.

First do your own research on here before invest.
https://coinmarketcap.com

Poloniex and Bittrex are very good. Binance also no problem

You can join bounties on here. Follow this section
https://bitcointalk.org/index.php?board=238.0

I would prefer Ethereum is best altcoin.

Coinbase does not support for ERC20 tokens. You have to use ERC20 tokens supported wallet like Myetherwallet.

If you are enabled 2FA, It's hard to hack via email or fake phishing site.

INS Ecosystem is pretty good bounty campaign to join. You can do a signature bounties.

I think it is a good investment for pretty long term.

Yes, Stratis is good coin for long term investment.

INS ecosystem is pretty cool ICO project 

Bitcoin is always act as a king and price will go up  Ethereum is very stable in this moment. Ethereum is good investment for long term. Because most ICO projects are based with Ethereum.

Haha don't you think bitcoin is better than altcoins? Btw I would like to go with ETH and STRAT 

I think both coins are not a bad investment and both coins are very stable in this time, But I prefer eth is better than ltc.

If you use that wallet for ERC20 tokens I think myetherwallet is best one.