I always check https://coinmarketcap.com/ when I think long-term investment.
The best coins for me are Ethereum, Monero, Litecoin, and recently Ripple. I think they are able to give a good profit in the long run.

If you have that kind of money, don't invest it in just one coin, invest in several, just in case one of them crashes. So better invest your 12K in several good coins.

The market won't get stable in the summer, many investors will go back on the market only after vacations, in August the earliest. The most probable period for the crypto market to become stable again is the end of the year - the beginning of 2019.

Market can always go down, not only now. I think now it is correcting itself. Altcoins are taking off again, so it's the golden opportunity to invest in them.

In my opinion, so many ICOs  fail because so many of them are scams. Another major part of ICOs have low quality or not very good  reputation, so they don't attract investors.

It is definitely risky  to invest in cryptocurrency because the price of crypto is very  volatile. Changes happen without any notice. And you can lose all you have in a whink of an eye.

I believe now is really a good time because it gives a chance to any investor to buy coins. Most of the coins are cheap right now and most of them might grow and bring thousands of dollars to their owners.

I think that there are two strong cryptocurrencies that will dominate the cryptomarket for a long time and they are the best choices for long-term investment. They are bitcoin and ethereum.

As for me I still invest in altcoins. But before investing I usually do some study. I try to learn about current situation on cryptomatket in general as well as about how a certain coin is listed on exchanges.

Altcoins are constantly trying to overcome bitcoin, so their developers are constantly improving their technologies in order to make them better options for investing.

Taking into considerations  the value of altcoins today, it would be wiser to hold them  and wait until their value will increase. Though it might take a lot of time.

In my belief, people in the community gives value to  tokens and coins. To make your altcoin successful and valuable you need to make other people know about. This means you need to advertise your coin.

I think it is not right to compare ripple and ethereum as they are very different coins and they are used for completely different purposes. Frost of all, ripple is a centralized coins which has been backed up by banks. Ethereum is totally free from that.

I believe that the best way to gain passive income is to invest in Bitcoin or Ethereum. These coins won't dissappear and they show tendency to increase their value in future.

In my belief, these two coins are both excellent for long-term investments. If you evaluate them from initial capital, I think Bitcoin and Ethereum are equally profitable.

The most accurate method  to do trading is to base it on technical analysis. It will help you to make right decisions, avoid mistakes and to calculate your next moves in trading.

I believe that nearly 90 % of ICOs are scam, infortunately it is very difficult to find a legimite one. Difficult, but possible. It requires time and very careful research.

In my opinion, Ethereum is one of the most successful projects at present with a lot of potential for the future. Taking into consideration, the current condition of the cryptomarket, it is natural to have doubts, but I don't think that ADA is a better option.

10k is a huge amount of money to invest. But in my opinion, the first rule of investing is to invest only that amount of money you can afford to lose. Another rule is to diversify your investment.

There are several ways where you can learn trading. You can visit investopedia, it's a great website where you ca get a lot of useful information. And of course there are some free online courses to learn technical analyses.