I don't think it's a good idea to set targets with a specific timeframe. You might end up rushing into trades when it's not the best time to do so. Or you might overextend your exit point.
I think it is fine to set target %, just not with a limited time window.

Trading is one way, but only if you're good at it. It depends what the markets are doing - sometimes trading is easy, sometimes it's harder.
At the moment I would just advise patience. Hold and wait for better conditions.

Bittrex is probably my favourite as it has good volumes, a lot of coins, and is very easy to use.
Always be careful with exchanges though - there has been plenty of recent news about hacks and phishing.

NEO for both short and long. I'm expecting it to have a huge 2018 as it becomes a more established platform and a fixture in China.

Those two look like they've bit hit really hard. Unlucky.
What often happens when markets turn green is those coins that fell the hardest also rise the quickest - certainly not in every case, but it can be a useful guide to what to buy.

Very difficult to tell, but it is certainly possible.
It is likely that other coins will have far more utility, not just the faster coins but also the platform coins. Smart contracts for example, so ETH. IoT as well. The coins that service these and numerous other markets will become increasingly important.

Bitcoin looks destined to be simply a store of value coin. Whether future developments (Lightning Network etc) will change this is hard to say.

If I had to guess, I would say ETH or XRP might take top spot in the medium term, and then possibly an IoT coin in the longer term.

No, it isn't warranted at all. The fundamentals haven't changed, and XEM/NEM wasn't at fault for the hack.
I have taken advantage of the price drop to buy extra NEM at a bargain price.

If you are good at trading, then trading is best. If you are not good at trading, then holding is best.
The thing with holding though is it is vitally important that the coins you hold are good ones.

If you find an ICO you like, it is generally preferable to buy at the ICO rather than rely on the bounty campaign, as with a lot of bounties you don't know how much you are going to get.

EtherDelta is okay if you need to trade ERC20 tokens, but don't store anything on there for long - there were major issues earlier this year.
0x would be my one to watch for the future.

XRP is extremely quick. We also need to take into account the transaction volumes, as this can affect the speed of a single transaction. A lot of coins to tend to get slower due to congestion.

There were a couple of things yesterday - the SEC comments, plus the Binance API hack.
The general trend viewed over six months is still upwards. This is just a minor dip, nothing to worry about.

It could happen, but bitcoin tends to lead the market recovery, which means the gap between BTC and ETH is likely to grow in the short term.
Maybe ETH can overtake in the longer term, but who knows? Agreed that there is certainly a chance as it is a good project and smart contracts will be big. IoT will also be big so maybe IOTA or a competitor can also take number one spot.

Yes, the markets will recover.
The fundamentals haven't changed. Crypto is still the future.
All that we've seen is a mega rise in December, and then a dramatic fall as the inevitable aftermath. If you look at the long term trend charts, it's a steady upwards line. Dec-Feb was an anomaly. Give it a couple of months, we'll see green as normal again.

For passive income I would look at masternode coins. The obvious problem being that as soon as a project announces it will have masternodes, the price shoots up. But if you can get in early, masternodes are the best bet, some offering phenomenal % returns.

Now is certainly the time for buying instead of selling. The huge sell-off seems to have ended, and we have had a few weeks of stability now. I think that the general upwards trend will continue soon.

I have been trying - but it is more difficult to convert people now after the bear market of the last couple of months. It was easier in December!

Yes, I would pay taxes once I had withdrawn to fiat.
It will depend on your country, but if you are withdrawing a large amount it may be sensible to consult an accountant.

A large part of trading is seeing the bigger picture. It always helps to zoom out on charts to see longer term trends.
If a coin looks like it is dropping over a period of a few hours, if you look instead over a month then it may be a minor dip in a steady rising trend.
I am by no means an expert trader, but rule#1 I think is always look at longer term patterns.

I'd say about $500 billion for 7th April. I think we're on a slow up-trend. The caveat is that I am very likely to be wrong