ETH seems safer according to Russia's statement about the cryptocurrency. Ripple has bigger risks but also the potential to make you more money in short time. Anyway, getting 50%- 50% is always my solution in this cases, but the bucket should not have more than 5 different coins, I guess. 

It will crash again, go to moon again, and crash again. But in this year, my guess is the moon according to my observations of people who wants to get in this world but couldn't do it yet.

But proffessional brokers fear me. The frequency of increases and decreases is very high compared to the time I first buy coins.

It seems like everyone has a story about how they missed the chance to buy BTC's years ago, I have one too. The husband of my cousin talked about it in 2012, I guess and the said it will be the global money and recommended us to buy some. I did not even google what BTC is that time 

If you're sure that the coin is scam, the statement is really logical. (which includes maybe 99% of the ICO's) But if you really trust the project and the team behind it, hodl it not to regret in the future.

I wish I knew the exact answer  If you have patience and will not need the money you invest in the near future, invest now. But for short term trades, maybe you should wait for the next big correction (a big crash)

I don't think it can reach BTC value but ETH's profit potential is bigger than BTC, for sure. As long as Russia does not decide to ban crypto, it will be more logical to stay in ETH rather than BTC, in my opinion.

NEO, VEN and NEBL are my favourite ones since the crash. Additionally ETH is a good long-term investing because of Russia's interest in cryptocurrency.

I can't even be sure about the whitepaper to be real or fake or just copied and posted from somewhere else.
So generally, I try to get info from those who have much more experience.

It is better to hodl the half of the portfolio for a long term and do short time trade with the other half, of course if you have enough time to do that.

I truly believe in blockchain but have some doubts about its usage in currency, more like practical issues. But in the end, their usage is inevitable with some regulations.

I began with bittrex and then move on with binance. The interface of bittrex was more complex, but I got used to it in a few transactions. But binance has a very easy trade interface for beginners, I think.

Ethereum has a potential of reaching maybe x10 price of today's price (like 10K USD) but I don't think it will ever reach the value of BTC.

The girls who also are interested in engineering, statistics or maths can also be interested in cryptocurrency and investing. The key point is acting without emotions.

If you are carefully watching the market, then you can hold your altcoins. You should follow the projects of altcoins in your portfolio, watch for the news, then follow the news about BTC and big coins to take action. If you are holding without any precaution, then losing possibility significantly increases of course.

Instead of giving holding up, we may take action before the next January. 250M USD market cap seems impossible to me.

VEN and SYS have way toooo much to go at the moment. For VEN, I expect to see 20 $ in the near future.

I would suggest Bittrex and Binance for the start. You can access huge number of coins for trading using those two. If you want more, kucoin and cryptopia would work.

They are green everywhere, why do you think that they are decreasing?

Who does not? You should follow the ongoing projects, make your own research and catch the train.

Not sure, BTC, as a tradition, may remain being leader for this cryptoworld. Replacing it, even for ETH, is very hard to manage.